From e7debe0bba35ca5d8537ca0b03ae35a178bba222 Mon Sep 17 00:00:00 2001
From: David Aspinall
Date: Tue, 11 Dec 2007 11:07:07 +0000
Subject: Deleted file

---
 images/next-plus-scanned-path-junk.svg | 193 -------
 images/pg-context.svg                  | 183 -------
 images/pg-find.svg                     | 950 ---------------------------------
 images/pg-goto.svg                     | 218 --------
 images/pg-help.svg                     | 214 --------
 images/pg-interrupt.svg                | 221 --------
 images/pg-next.svg                     | 179 -------
 images/pg-restart.svg                  | 240 ---------
 images/pg-retract.svg                  | 188 -------
 images/pg-undo.svg                     | 180 -------
 images/pg-use.svg                      | 186 -------
 11 files changed, 2952 deletions(-)
 delete mode 100644 images/next-plus-scanned-path-junk.svg
 delete mode 100644 images/pg-context.svg
 delete mode 100644 images/pg-find.svg
 delete mode 100644 images/pg-goto.svg
 delete mode 100644 images/pg-help.svg
 delete mode 100644 images/pg-interrupt.svg
 delete mode 100644 images/pg-next.svg
 delete mode 100644 images/pg-restart.svg
 delete mode 100644 images/pg-retract.svg
 delete mode 100644 images/pg-undo.svg
 delete mode 100644 images/pg-use.svg

diff --git a/images/next-plus-scanned-path-junk.svg b/images/next-plus-scanned-path-junk.svg
deleted file mode 100644
index 9f312fbf..00000000
--- a/images/next-plus-scanned-path-junk.svg
+++ /dev/null
@@ -1,193 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="next-plus-scanned-path-junk.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       inkscape:collect="always"
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#084208;stop-opacity:0;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="244.68138"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="12"
-     inkscape:window-y="0" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;fill-opacity:1.0"
-       d="M 225.21429,107.6479 L 225.21429,123.6479 L 240.17125,115.6479 L 225.21429,107.6479 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-    <image
-       y="108.1479"
-       x="205.71429"
-       id="image5339"
-       height="16"
-       width="16"
-       sodipodi:absref="/home/da/icons/fwd.gif"
-       xlink:href="/home/da/icons/fwd.gif"
-       style="fill:#375d37;fill-opacity:0.20731447" />
-    <path
-       style="fill:#000000"
-       d="M 246.21563,118.01071 C 246.21563,110.99568 246.21563,110.99568 251.19766,114.25336 C 257.22483,118.19445 257.22685,117.7738 251.16153,121.76839 C 246.21563,125.02573 246.21563,125.02573 246.21563,118.01071 z M 250.01563,120.81105 C 251.79101,119.03567 251.47624,116.55688 249.21563,114.51105 C 247.24284,112.7257 247.21563,112.76442 247.21563,117.35606 C 247.21563,122.1091 247.88797,122.93871 250.01563,120.81105 z "
-       id="path5342" />
-  </g>
-</svg>
diff --git a/images/pg-context.svg b/images/pg-context.svg
deleted file mode 100644
index c60efd2a..00000000
--- a/images/pg-context.svg
+++ /dev/null
@@ -1,183 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-context.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#c8c8c8;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="233.07632"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse" />
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient3279"
-       gradientUnits="userSpaceOnUse"
-       x1="224.71429"
-       y1="115.6479"
-       x2="233.07632"
-       y2="115.6479"
-       gradientTransform="matrix(-1,0,0,1,465.45389,8e-7)" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="193"
-     inkscape:window-y="67" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)" />
-</svg>
diff --git a/images/pg-find.svg b/images/pg-find.svg
deleted file mode 100644
index 9805429f..00000000
--- a/images/pg-find.svg
+++ /dev/null
@@ -1,950 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-find.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4"><linearGradient
-   id="linearGradient5376">
-  <stop
-     style="stop-color:#084208;stop-opacity:1;"
-     offset="0"
-     id="stop5378" />
-  <stop
-     style="stop-color:#c8c8c8;stop-opacity:1;"
-     offset="1"
-     id="stop5380" />
-</linearGradient>
-<marker
-   inkscape:stockid="Arrow1Send"
-   orient="auto"
-   refY="0.0"
-   refX="0.0"
-   id="Arrow1Send"
-   style="overflow:visible;">
-  <path
-     id="path3152"
-     d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-     transform="scale(0.2) rotate(180) translate(6,0)" />
-</marker>
-<marker
-   inkscape:stockid="Arrow1Lstart"
-   orient="auto"
-   refY="0.0"
-   refX="0.0"
-   id="Arrow1Lstart"
-   style="overflow:visible">
-  <path
-     id="path3137"
-     d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-     transform="scale(0.8) translate(12.5,0)" />
-</marker>
-<marker
-   inkscape:stockid="Arrow1Mstart"
-   orient="auto"
-   refY="0.0"
-   refX="0.0"
-   id="Arrow1Mstart"
-   style="overflow:visible">
-  <path
-     id="path3143"
-     d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-     transform="scale(0.4) translate(10,0)" />
-</marker>
-<marker
-   inkscape:stockid="TriangleOutS"
-   orient="auto"
-   refY="0.0"
-   refX="0.0"
-   id="TriangleOutS"
-   style="overflow:visible">
-  <path
-     id="path3241"
-     d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-     transform="scale(0.2)" />
-</marker>
-<marker
-   inkscape:stockid="TriangleInS"
-   orient="auto"
-   refY="0.0"
-   refX="0.0"
-   id="TriangleInS"
-   style="overflow:visible">
-  <path
-     id="path3232"
-     d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-     transform="scale(-0.2)" />
-</marker>
-<marker
-   inkscape:stockid="TriangleOutM"
-   orient="auto"
-   refY="0"
-   refX="0"
-   id="TriangleOutM"
-   style="overflow:visible">
-  <path
-     id="path3238"
-     d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-     transform="scale(0.4,0.4)" />
-</marker>
-<marker
-   inkscape:stockid="TriangleOutL"
-   orient="auto"
-   refY="0"
-   refX="0"
-   id="TriangleOutL"
-   style="overflow:visible">
-  <path
-     id="path3235"
-     d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-     style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-     transform="scale(0.8,0.8)" />
-</marker>
-<linearGradient
-   y2="135.627"
-   x2="189.6787"
-   y1="135.627"
-   x1="98.557602"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient2326"
-   xlink:href="#XMLID_3_"
-   inkscape:collect="always" />
-<linearGradient
-   y2="208.0907"
-   x2="223.1826"
-   y1="220.91991"
-   x1="211.957"
-   gradientTransform="matrix(0.9999,1.2e-2,-1.2e-2,0.9999,2.579,-2.6)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient2324"
-   xlink:href="#XMLID_2_"
-   inkscape:collect="always" />
-
-
-
-    
-    
-  <linearGradient
-   y2="135.627"
-   x2="189.6787"
-   y1="135.627"
-   x1="98.557602"
-   gradientUnits="userSpaceOnUse"
-   id="XMLID_3_">
-      <stop
-   id="stop184"
-   style="stop-color:#FFFFFF"
-   offset="0" />
-
-
-
-      <stop
-   id="stop185"
-   style="stop-color:#CBD5E8"
-   offset="1" />
-
-
-
-    </linearGradient>
-
-
-
-    
-    
-    
-    
-    
-    <linearGradient
-   gradientTransform="matrix(0.9999,1.2e-2,-1.2e-2,0.9999,2.579,-2.6)"
-   y2="208.0907"
-   x2="223.1826"
-   y1="220.91991"
-   x1="211.957"
-   gradientUnits="userSpaceOnUse"
-   id="XMLID_2_">
-      <stop
-   id="stop173"
-   style="stop-color:#ff5800;stop-opacity:1.0000000;"
-   offset="0.0000000" />
-
-
-
-      <stop
-   id="stop174"
-   style="stop-color:#ffcc31;stop-opacity:1.0000000;"
-   offset="1.0000000" />
-
-
-
-    </linearGradient>
-
-
-
-    
-    
-    
-    
-    
-    
-    <linearGradient
-   y2="312.2099"
-   x2="312.32861"
-   y1="86.276398"
-   x1="86.394997"
-   gradientUnits="userSpaceOnUse"
-   id="XMLID_1_">
-      <stop
-   id="stop161"
-   style="stop-color:#FFFFFF"
-   offset="0" />
-
-
-
-      <stop
-   id="stop162"
-   style="stop-color:#99CCFF"
-   offset="1" />
-
-
-
-    </linearGradient>
-
-
-
-    
-    
-    
-    <linearGradient
-   y2="12.737786"
-   x2="148.01166"
-   y1="5.295383"
-   x1="154.70367"
-   gradientTransform="matrix(0.57735,0,0,1.732051,0,-5)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient1280"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-<linearGradient
-   y2="64.408142"
-   x2="61.494499"
-   y1="57.359093"
-   x1="68.409271"
-   gradientTransform="scale(1.732051,0.57735)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient1279"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-<linearGradient
-   y2="22.21875"
-   x2="101.95312"
-   y1="17.296875"
-   x1="106.875"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient1278"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-<linearGradient
-   y2="66.19474"
-   x2="76.51638"
-   y1="197.54245"
-   x1="-59.549145"
-   gradientTransform="scale(0.960547,1.041074)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient1277"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-<linearGradient
-   y2="51.599213"
-   x2="74.86158"
-   y1="11.005426"
-   x1="118.16164"
-   gradientTransform="scale(0.962223,1.03926)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient1276"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-</defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="11.277498"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="37"
-     inkscape:window-y="0" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:groupmode="layer"
-     id="layer2"
-     inkscape:label="Bottom" />
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <text
-       xml:space="preserve"
-       style="font-size:7.48321962px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;fill:#004a00;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Bitstream Vera Sans"
-       x="185.89714"
-       y="153.90065"
-       id="text3501"
-       sodipodi:linespacing="125%"
-       transform="scale(1.265197,0.7903907)"><tspan
-         sodipodi:role="line"
-         id="tspan3503"
-         x="185.89714"
-         y="153.90065">ϕ</tspan></text>
-    <text
-       xml:space="preserve"
-       style="font-size:7.71500158px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;fill:#004a00;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Bitstream Vera Sans"
-       x="193.35237"
-       y="144.01877"
-       id="text3497"
-       sodipodi:linespacing="125%"
-       transform="scale(1.2319194,0.8117414)"><tspan
-         sodipodi:role="line"
-         id="tspan3499"
-         x="193.35237"
-         y="144.01877">ϕ</tspan></text>
-    <g
-       style="overflow:visible"
-       id="g3424"
-       transform="matrix(-0.1132813,0,0,0.1132813,249.71429,98.147892)">
-      <g
-         transform="translate(2.016911,2.016928)"
-         id="g1124"><metadata
-   id="metadata1">
-  <rdf:RDF>
-    <cc:Work
-   rdf:about="">
-      <dc:format>image/svg+xml</dc:format>
-
-
-
-      <dc:type
-   rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-
-
-
-    </cc:Work>
-
-
-
-  </rdf:RDF>
-
-
-
-</metadata>
-
-
-
-
-  <defs
-   id="defs181">
-  <linearGradient
-   inkscape:collect="always"
-   xlink:href="#XMLID_1_"
-   id="linearGradient32"
-   gradientUnits="userSpaceOnUse"
-   x1="86.394997"
-   y1="86.276398"
-   x2="312.32861"
-   y2="312.2099" />
-
-
-
-  <linearGradient
-   inkscape:collect="always"
-   xlink:href="#XMLID_2_"
-   id="linearGradient33"
-   gradientUnits="userSpaceOnUse"
-   x1="121.918"
-   y1="185.75"
-   x2="249.582"
-   y2="185.75" />
-
-
-
-  <linearGradient
-   y2="12.737786"
-   x2="148.01166"
-   y1="5.295383"
-   x1="154.70367"
-   gradientTransform="matrix(0.57735,0,0,1.732051,0,-5)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient135"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="64.408142"
-   x2="61.494499"
-   y1="57.359093"
-   x1="68.409271"
-   gradientTransform="scale(1.732051,0.57735)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient134"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="22.21875"
-   x2="101.95312"
-   y1="17.296875"
-   x1="106.875"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient133"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="66.19474"
-   x2="76.51638"
-   y1="197.54245"
-   x1="-59.549145"
-   gradientTransform="scale(0.960547,1.041074)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient132"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="51.599213"
-   x2="74.86158"
-   y1="11.005426"
-   x1="118.16164"
-   gradientTransform="scale(0.962223,1.03926)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient131"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="12.737786"
-   x2="148.01166"
-   y1="5.295383"
-   x1="154.70367"
-   gradientTransform="matrix(0.57735,0,0,1.732051,0,-5)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient130"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="64.408142"
-   x2="61.494499"
-   y1="57.359093"
-   x1="68.409271"
-   gradientTransform="scale(1.732051,0.57735)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient129"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="22.21875"
-   x2="101.95312"
-   y1="17.296875"
-   x1="106.875"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient128"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="66.19474"
-   x2="76.51638"
-   y1="197.54245"
-   x1="-59.549145"
-   gradientTransform="scale(0.960547,1.041074)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient127"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="51.599213"
-   x2="74.86158"
-   y1="11.005426"
-   x1="118.16164"
-   gradientTransform="scale(0.962223,1.03926)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient126"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="64.408142"
-   x2="61.494499"
-   y1="57.359093"
-   x1="68.409271"
-   gradientTransform="scale(1.732051,0.57735)"
-   id="linearGradient447"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="22.21875"
-   x2="101.95312"
-   y1="17.296875"
-   x1="106.875"
-   id="linearGradient443"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="66.19474"
-   x2="76.51638"
-   y1="197.54245"
-   x1="-59.549145"
-   gradientTransform="scale(0.960547,1.041074)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient439"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="51.599213"
-   x2="74.86158"
-   y1="11.005426"
-   x1="118.16164"
-   gradientTransform="scale(0.962223,1.03926)"
-   id="linearGradient437"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="12.737786"
-   x2="148.01166"
-   y1="5.295383"
-   x1="154.70367"
-   gradientTransform="matrix(0.57735,0,0,1.732051,0,-5)"
-   id="linearGradient432"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   y2="84.253471"
-   x2="77.756599"
-   y1="156.12636"
-   x1="31.319887"
-   gradientTransform="scale(0.952353,1.050031)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient105"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="MaterialSoftShadow">
-    <stop
-   id="stop2619"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop2621"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop2620"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="51.599213"
-   x2="74.86158"
-   y1="11.005426"
-   x1="118.16164"
-   gradientTransform="scale(0.962223,1.03926)"
-   id="linearGradient93"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="linearGradient94">
-    <stop
-   id="stop95"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop96"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop97"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  <linearGradient
-   y2="66.19474"
-   x2="76.51638"
-   y1="197.54245"
-   x1="-59.549145"
-   gradientTransform="scale(0.960547,1.041074)"
-   gradientUnits="userSpaceOnUse"
-   id="linearGradient98"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="linearGradient99">
-    <stop
-   id="stop100"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop101"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop102"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="22.21875"
-   x2="101.95312"
-   y1="17.296875"
-   x1="106.875"
-   id="linearGradient103"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="linearGradient104">
-    <stop
-   id="stop105"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop106"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop107"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="64.408142"
-   x2="61.494499"
-   y1="57.359093"
-   x1="68.409271"
-   gradientTransform="scale(1.732051,0.57735)"
-   id="linearGradient108"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="linearGradient109">
-    <stop
-   id="stop110"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop111"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop112"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  <linearGradient
-   gradientUnits="userSpaceOnUse"
-   y2="12.737786"
-   x2="148.01166"
-   y1="5.295383"
-   x1="154.70367"
-   gradientTransform="matrix(0.57735,0,0,1.732051,0,-5)"
-   id="linearGradient113"
-   xlink:href="#MaterialSoftShadow"
-   inkscape:collect="always" />
-
-
-
-  <linearGradient
-   id="linearGradient114">
-    <stop
-   id="stop115"
-   offset="0.0000000"
-   style="stop-color:#000000;stop-opacity:0.21568628;" />
-
-
-
-    <stop
-   id="stop116"
-   offset="0.50000000"
-   style="stop-color:#000000;stop-opacity:0.098;" />
-
-
-
-    <stop
-   id="stop117"
-   offset="1"
-   style="stop-color:#000000;stop-opacity:0;" />
-
-
-
-  </linearGradient>
-
-
-
-  
-  
-  
-  
-  
-</defs>
-
-
-
-
-  <sodipodi:namedview
-   id="namedview1252"
-   inkscape:zoom="5.9833333"
-   inkscape:cx="36.183844"
-   inkscape:cy="30.885792"
-   inkscape:window-width="640"
-   inkscape:window-height="538"
-   inkscape:window-x="632"
-   inkscape:window-y="208"
-   inkscape:current-layer="svg153" />
-
-
-
-
-  
-
-
-
-  
-
-
-
-</g>
-      <g
-         style="stroke:#000000"
-         id="Layer_2">
-    <path
-   style="fill:none;stroke:none"
-   id="path155"
-   d="M 256,256 L 0,256 L 0,0 L 256,0 L 256,256 z " />
-
-
-
-  </g>
-      <path
-         style="opacity:0.2;stroke:none"
-         id="path169"
-         d="M 249.922,236.827 L 201.161,188.067 C 198.656,185.562 194.595,185.562 192.09,188.067 L 191.523,188.634 L 185.088,182.199 C 195.407,171.779 201.785,157.448 201.785,141.625 C 201.785,109.777 175.967,83.958 144.117,83.958 C 112.269,83.958 86.451,109.776 86.451,141.625 C 86.451,173.474 112.269,199.292 144.117,199.292 C 157.832,199.292 170.421,194.496 180.319,186.501 L 186.987,193.169 L 186.419,193.736 C 183.914,196.241 183.914,200.302 186.419,202.806 L 235.18,251.568 C 237.686,254.072 241.746,254.072 244.251,251.568 L 249.922,245.898 C 252.427,243.394 252.427,239.332 249.922,236.827 z " />
-      <path
-         style="stroke:none"
-         id="path170"
-         d="M 147.865,148.048 L 195.491,195.674 L 200.027,191.14 L 152.401,143.514 L 147.865,148.048 z " />
-      <path
-         style="fill:#000000;fill-opacity:1;stroke:none"
-         id="path171"
-         d="M 186.419,187.737 C 183.914,190.242 183.914,194.303 186.419,196.807 L 235.18,245.569 C 237.686,248.073 241.746,248.073 244.251,245.569 L 249.922,239.899 C 252.427,237.393 252.427,233.332 249.922,230.827 L 201.161,182.067 C 198.656,179.562 194.595,179.562 192.09,182.067 L 186.419,187.737 z " />
-      <path
-         style="fill:url(#linearGradient2324);stroke:none"
-         id="path178"
-         d="M 199.248,184.105 C 198.013,182.84 195.977,182.816 194.713,184.051 L 188.975,189.654 C 187.71,190.888 187.686,192.924 188.92,194.188 L 237.093,243.529 C 238.328,244.796 240.364,244.82 241.628,243.584 L 247.365,237.983 C 248.632,236.748 248.656,234.712 247.42,233.448 L 199.248,184.105 z " />
-      <path
-         style="fill:#333333;stroke:none"
-         id="path179"
-         d="M 86.451,135.626 C 86.451,167.475 112.269,193.293 144.117,193.293 C 175.967,193.293 201.785,167.475 201.785,135.626 C 201.785,103.778 175.967,77.959 144.117,77.959 C 112.27,77.959 86.451,103.778 86.451,135.626 z " />
-      <path
-         style="fill:#cccccc;stroke:none"
-         id="path180"
-         d="M 90.54,135.626 C 90.54,165.169 114.576,189.204 144.118,189.204 C 173.662,189.204 197.697,165.169 197.697,135.626 C 197.697,106.083 173.662,82.048 144.118,82.048 C 114.575,82.048 90.54,106.083 90.54,135.626 z " />
-      <path
-         style="fill:#ffffff;stroke:none"
-         id="path181"
-         d="M 92.143,136.428 C 92.143,106.886 116.179,82.85 145.722,82.85 C 153.897,82.85 161.647,84.698 168.586,87.986 C 161.244,84.201 152.931,82.049 144.117,82.049 C 114.575,82.049 90.539,106.084 90.539,135.627 C 90.539,156.996 103.116,175.475 121.254,184.069 C 103.986,175.164 92.143,157.158 92.143,136.428 z " />
-      <path
-         style="fill:#003366;stroke:none"
-         id="path182"
-         d="M 95.351,135.626 C 95.351,162.518 117.228,184.393 144.118,184.393 C 171.009,184.393 192.886,162.518 192.886,135.626 C 192.886,108.736 171.009,86.859 144.118,86.859 C 117.228,86.859 95.351,108.736 95.351,135.626 z " />
-      <path
-         style="fill:url(#linearGradient2326);stroke:none"
-         id="path189"
-         d="M 98.558,135.626 C 98.558,160.748 118.996,181.187 144.118,181.187 C 169.241,181.187 189.68,160.749 189.68,135.626 C 189.68,110.505 169.242,90.066 144.118,90.066 C 118.996,90.066 98.558,110.505 98.558,135.626 z " />
-      <path
-         style="fill:#ffffff;stroke:none"
-         id="path190"
-         d="M 100.558,135.626 C 100.558,142.025 101.956,148.1 104.445,153.578 C 106.086,153.003 107.623,152.181 109,151 C 131.087,136.059 149.378,113.525 171.82,102.034 C 164.285,95.81 154.63,92.066 144.117,92.066 C 120.098,92.066 100.558,111.607 100.558,135.626 z " />
-    </g>
-    <text
-       xml:space="preserve"
-       style="font-size:10.28180504px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;fill:#004a00;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Bitstream Vera Sans"
-       x="184.9283"
-       y="143.57057"
-       id="text3493"
-       sodipodi:linespacing="125%"
-       transform="scale(1.243806,0.8039839)"><tspan
-         sodipodi:role="line"
-         id="tspan3495"
-         x="184.9283"
-         y="143.57057">ϕ</tspan></text>
-  </g>
-</svg>
diff --git a/images/pg-goto.svg b/images/pg-goto.svg
deleted file mode 100644
index 92f21a76..00000000
--- a/images/pg-goto.svg
+++ /dev/null
@@ -1,218 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-goto.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#c8c8c8;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="114.61499"
-       x2="232.73132"
-       y2="114.61499"
-       gradientUnits="userSpaceOnUse"
-       gradientTransform="translate(0,1.000001)" />
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient3279"
-       gradientUnits="userSpaceOnUse"
-       x1="224.71429"
-       y1="115.6479"
-       x2="233.07632"
-       y2="115.6479"
-       gradientTransform="matrix(-1,0,0,1,465.39313,8e-7)" />
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient3961"
-       gradientUnits="userSpaceOnUse"
-       gradientTransform="matrix(-1,0,0,1,465.42858,1.0329094)"
-       x1="224.71429"
-       y1="114.61499"
-       x2="232.73132"
-       y2="114.61499" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="62"
-     inkscape:window-y="52" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 225.21429,107.61499 L 225.21429,123.61499 L 232.65665,115.63279 L 225.21429,107.61499 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-    <path
-       style="fill:url(#linearGradient3961);fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 240.21429,107.6479 L 240.21429,123.6479 L 232.77193,115.6657 L 240.21429,107.6479 z "
-       id="path3959"
-       sodipodi:nodetypes="cccc" />
-    <path
-       sodipodi:type="arc"
-       style="fill:#004f00;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:0;stroke-dasharray:none;stroke-opacity:1"
-       id="path3305"
-       sodipodi:cx="11.027848"
-       sodipodi:cy="10.010126"
-       sodipodi:rx="2.0962026"
-       sodipodi:ry="2.0962026"
-       d="M 13.124045,10.00502 A 2.0962026,2.0962026 0 1 1 13.123378,9.9570065"
-       transform="translate(222.09024,105.73398)"
-       sodipodi:start="6.2807495"
-       sodipodi:end="12.541027"
-       sodipodi:open="true" />
-  </g>
-</svg>
diff --git a/images/pg-help.svg b/images/pg-help.svg
deleted file mode 100644
index aed4ab00..00000000
--- a/images/pg-help.svg
+++ /dev/null
@@ -1,214 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-help.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient7950">
-      <stop
-         style="stop-color:#850f0f;stop-opacity:1;"
-         offset="0"
-         id="stop7952" />
-      <stop
-         style="stop-color:#c8c8c8;stop-opacity:1;"
-         offset="1"
-         id="stop7954" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow2Mend"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Mend"
-       style="overflow:visible;">
-      <path
-         id="path3202"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.6) rotate(180) translate(0,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Sstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Sstart"
-       style="overflow:visible">
-      <path
-         id="path3205"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Send"
-       style="overflow:visible;">
-      <path
-         id="path3208"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) rotate(180) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="13.132561"
-     inkscape:cy="11.523411"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="635"
-     inkscape:window-x="47"
-     inkscape:window-y="188" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <text
-       xml:space="preserve"
-       style="font-size:28px;font-style:italic;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:100%;writing-mode:lr-tb;text-anchor:start;fill:#0b0059;fill-opacity:1;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Liberation Serif"
-       x="224.44672"
-       y="125.18697"
-       id="text3963"
-       sodipodi:linespacing="100%"><tspan
-         sodipodi:role="line"
-         id="tspan4031"
-         x="224.44672"
-         y="125.18697">?</tspan></text>
-  </g>
-</svg>
diff --git a/images/pg-interrupt.svg b/images/pg-interrupt.svg
deleted file mode 100644
index 44053af8..00000000
--- a/images/pg-interrupt.svg
+++ /dev/null
@@ -1,221 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-interrupt.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient7950">
-      <stop
-         style="stop-color:#850f0f;stop-opacity:1;"
-         offset="0"
-         id="stop7952" />
-      <stop
-         style="stop-color:#c8c8c8;stop-opacity:1;"
-         offset="1"
-         id="stop7954" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow2Mend"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Mend"
-       style="overflow:visible;">
-      <path
-         id="path3202"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.6) rotate(180) translate(0,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Sstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Sstart"
-       style="overflow:visible">
-      <path
-         id="path3205"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Send"
-       style="overflow:visible;">
-      <path
-         id="path3208"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) rotate(180) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient7950"
-       id="linearGradient7956"
-       x1="232.82144"
-       y1="118.45053"
-       x2="232.82144"
-       y2="105.26572"
-       gradientUnits="userSpaceOnUse"
-       gradientTransform="translate(-0.57142,-1.3521034)" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="13.132561"
-     inkscape:cy="11.523411"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="635"
-     inkscape:window-x="53"
-     inkscape:window-y="77" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <rect
-       style="fill:url(#linearGradient7956);fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:4.80000019;stroke-dasharray:none;stroke-opacity:1"
-       id="rect7864"
-       width="13.428589"
-       height="12.647903"
-       x="226.21429"
-       y="110" />
-  </g>
-</svg>
diff --git a/images/pg-next.svg b/images/pg-next.svg
deleted file mode 100644
index 04d5f802..00000000
--- a/images/pg-next.svg
+++ /dev/null
@@ -1,179 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-next.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#c8c8c8;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="244.68138"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="53"
-     inkscape:window-y="89" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;fill-opacity:1.0"
-       d="M 225.21429,107.6479 L 225.21429,123.6479 L 240.17125,115.6479 L 225.21429,107.6479 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-  </g>
-</svg>
diff --git a/images/pg-restart.svg b/images/pg-restart.svg
deleted file mode 100644
index e6743a68..00000000
--- a/images/pg-restart.svg
+++ /dev/null
@@ -1,240 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-restart.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient10266">
-      <stop
-         id="stop10268"
-         offset="0"
-         style="stop-color:#850f0f;stop-opacity:1;" />
-      <stop
-         id="stop10270"
-         offset="1"
-         style="stop-color:#dcdcdc;stop-opacity:1;" />
-    </linearGradient>
-    <linearGradient
-       id="linearGradient7856">
-      <stop
-         style="stop-color:#004700;stop-opacity:1;"
-         offset="0"
-         id="stop7858" />
-      <stop
-         style="stop-color:#dcdcdc;stop-opacity:1;"
-         offset="1"
-         id="stop7860" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow2Mend"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Mend"
-       style="overflow:visible;">
-      <path
-         id="path3202"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.6) rotate(180) translate(0,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Sstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Sstart"
-       style="overflow:visible">
-      <path
-         id="path3205"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow2Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow2Send"
-       style="overflow:visible;">
-      <path
-         id="path3208"
-         style="font-size:12.0;fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;"
-         d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z "
-         transform="scale(0.3) rotate(180) translate(-2.3,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient7856"
-       id="linearGradient7862"
-       x1="7.2352862"
-       y1="-3.8060107"
-       x2="15.597629"
-       y2="27.606647"
-       gradientUnits="userSpaceOnUse" />
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient10266"
-       id="linearGradient10264"
-       gradientUnits="userSpaceOnUse"
-       x1="7.2352862"
-       y1="-3.8060107"
-       x2="15.597629"
-       y2="27.606647"
-       gradientTransform="translate(10.39494,10.02025)" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="22.924146"
-     inkscape:cy="13.643434"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="78"
-     inkscape:window-y="17" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient10264);fill-opacity:1.0;stroke:#000000;stroke-width:1;stroke-linecap:square;stroke-linejoin:round;stroke-miterlimit:4.80000019;stroke-opacity:1;stroke-dasharray:none"
-       d="M 11.625,1.84375 C 6.0885896,2.11081 1.76419,6.86984 2.03125,12.40625 C 2.3108801,18.20332 8.12002,21.89408 13.5625,20.9375 L 15.53125,20.5625 L 14.84375,16.625 L 12.875,16.96875 C 9.6494396,17.53568 6.18146,15.33276 6.03125,12.21875 C 5.8684701,8.8440797 8.43783,6.00653 11.8125,5.84375 C 13.31245,5.7714002 14.660862,6.0533 15.630222,6.625 C 16.599582,7.1967002 17.039832,7.82316 17.3125,9.28125 L 16.949684,10.663212 C 16.205388,10.545885 14.626632,10.709853 14.194541,10.592009 L 18.152848,15.032991 L 22.4375,10.84375 C 22.101734,10.943572 20.837267,10.771504 20.463608,10.819462 L 20.704905,8.7014241 C 20.649906,5.9945338 20.123737,4.9855244 18.451345,3.4912974 C 16.793075,2.0096885 13.71572,1.7429 11.625,1.84375 z "
-       transform="translate(220.71429,104.1479)"
-       id="path3170"
-       sodipodi:nodetypes="csccccssscccccccsc" />
-  </g>
-</svg>
diff --git a/images/pg-retract.svg b/images/pg-retract.svg
deleted file mode 100644
index 6a91cc8f..00000000
--- a/images/pg-retract.svg
+++ /dev/null
@@ -1,188 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-retract.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#dcdcdc;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="244.68138"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse"
-       gradientTransform="matrix(-1,0,0,1,467.17858,0)" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="1"
-     inkscape:window-y="17" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 241.96429,107.6479 L 241.96429,123.6479 L 227.00733,115.6479 L 241.96429,107.6479 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-    <rect
-       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-linecap:square;stroke-linejoin:round;stroke-miterlimit:4.80000019;stroke-dasharray:none;stroke-opacity:1"
-       id="rect2178"
-       width="0.4173584"
-       height="12.852097"
-       x="-226.13165"
-       y="109.3979"
-       transform="scale(-1,1)" />
-  </g>
-</svg>
diff --git a/images/pg-undo.svg b/images/pg-undo.svg
deleted file mode 100644
index 336493ce..00000000
--- a/images/pg-undo.svg
+++ /dev/null
@@ -1,180 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-undo.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#dcdcdc;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="244.68138"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse"
-       gradientTransform="matrix(-1,0,0,1,465.38554,0)" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="11.513924"
-     inkscape:cy="12.486076"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="39"
-     inkscape:window-y="129" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 240.17125,107.6479 L 240.17125,123.6479 L 225.21429,115.6479 L 240.17125,107.6479 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-  </g>
-</svg>
diff --git a/images/pg-use.svg b/images/pg-use.svg
deleted file mode 100644
index d2e571ea..00000000
--- a/images/pg-use.svg
+++ /dev/null
@@ -1,186 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://web.resource.org/cc/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2"
-   sodipodi:version="0.32"
-   inkscape:version="0.45.1"
-   version="1.0"
-   sodipodi:docbase="/home/da/cvs/PG/ProofGeneral.working/images"
-   sodipodi:docname="pg-use.svg"
-   inkscape:output_extension="org.inkscape.output.svg.inkscape">
-  <defs
-     id="defs4">
-    <linearGradient
-       id="linearGradient5376">
-      <stop
-         style="stop-color:#084208;stop-opacity:1;"
-         offset="0"
-         id="stop5378" />
-      <stop
-         style="stop-color:#dcdcdc;stop-opacity:1;"
-         offset="1"
-         id="stop5380" />
-    </linearGradient>
-    <marker
-       inkscape:stockid="Arrow1Send"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Send"
-       style="overflow:visible;">
-      <path
-         id="path3152"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
-         transform="scale(0.2) rotate(180) translate(6,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Lstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Lstart"
-       style="overflow:visible">
-      <path
-         id="path3137"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.8) translate(12.5,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="Arrow1Mstart"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="Arrow1Mstart"
-       style="overflow:visible">
-      <path
-         id="path3143"
-         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.4) translate(10,0)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleOutS"
-       style="overflow:visible">
-      <path
-         id="path3241"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleInS"
-       orient="auto"
-       refY="0.0"
-       refX="0.0"
-       id="TriangleInS"
-       style="overflow:visible">
-      <path
-         id="path3232"
-         d="M 5.77,0.0 L -2.88,5.0 L -2.88,-5.0 L 5.77,0.0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
-         transform="scale(-0.2)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutM"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutM"
-       style="overflow:visible">
-      <path
-         id="path3238"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.4,0.4)" />
-    </marker>
-    <marker
-       inkscape:stockid="TriangleOutL"
-       orient="auto"
-       refY="0"
-       refX="0"
-       id="TriangleOutL"
-       style="overflow:visible">
-      <path
-         id="path3235"
-         d="M 5.77,0 L -2.88,5 L -2.88,-5 L 5.77,0 z "
-         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
-         transform="scale(0.8,0.8)" />
-    </marker>
-    <linearGradient
-       inkscape:collect="always"
-       xlink:href="#linearGradient5376"
-       id="linearGradient5382"
-       x1="224.71429"
-       y1="115.6479"
-       x2="244.68138"
-       y2="115.6479"
-       gradientUnits="userSpaceOnUse" />
-  </defs>
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     gridtolerance="10000"
-     guidetolerance="10"
-     objecttolerance="10"
-     inkscape:pageopacity="0.0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="16.458333"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     width="24px"
-     height="24px"
-     showgrid="true"
-     inkscape:window-width="822"
-     inkscape:window-height="581"
-     inkscape:window-x="1"
-     inkscape:window-y="17" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1"
-     transform="translate(-220.71429,-104.1479)">
-    <path
-       style="fill:url(#linearGradient5382);fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;fill-opacity:1.0"
-       d="M 225.21429,107.6479 L 225.21429,123.6479 L 240.17125,115.6479 L 225.21429,107.6479 z "
-       id="path4343"
-       sodipodi:nodetypes="cccc" />
-    <rect
-       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-linecap:square;stroke-linejoin:round;stroke-miterlimit:4.80000019;stroke-dasharray:none;stroke-opacity:1"
-       id="rect2178"
-       width="0.4173584"
-       height="12.852097"
-       x="241.04694"
-       y="109.3979" />
-  </g>
-</svg>
-- 
cgit v1.2.3