adding simplify icon.

css/app.css

@@ -505,6 +505,7 @@ button[disabled] .icon.nearby     { background-position: -340px -40px;}
 .icon-operation-merge         { background-position: -140px -140px;}
 .icon-operation-orthogonalize { background-position: -160px -140px;}
 .icon-operation-rotate        { background-position: -180px -140px;}
+.icon-operation-simplify      { background-position: -200px -140px;}
 
 
 /* Toggle icon is special */

img/source/sprite.svg

@@ -38,12 +38,12 @@
      borderopacity="1.0"
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
-     inkscape:zoom="15.622585"
-     inkscape:cx="150.86741"
-     inkscape:cy="43.777519"
+     inkscape:zoom="5.5730837"
+     inkscape:cx="185.63844"
+     inkscape:cy="51.718763"
      inkscape:document-units="px"
      inkscape:current-layer="layer12"
-     showgrid="true"
+     showgrid="false"
      inkscape:window-width="1280"
      inkscape:window-height="700"
      inkscape:window-x="48"
@@ -56,7 +56,7 @@
      showguides="false"
      inkscape:guide-bbox="true"
      inkscape:snap-bbox="true"
-     inkscape:snap-nodes="false">
+     inkscape:snap-nodes="true">
     <inkscape:grid
        type="xygrid"
        id="grid12420"
@@ -1256,5 +1256,25 @@
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        inkscape:connector-curvature="0"
        sodipodi:nodetypes="sssss" />
+    <g
+       id="g7282">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6699"
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+         style="font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:normal;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#222222;fill-opacity:1;stroke:none;stroke-width:2;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Sans;-inkscape-font-specification:Sans" />
+      <path
+         inkscape:connector-curvature="0"
+         id="path7209"
+         d="m 228,156 0,2 14,0 0,-2 -14,0 z"
+         style="font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:normal;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#222222;fill-opacity:1;stroke:none;stroke-width:2;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Sans;-inkscape-font-specification:Sans" />
+      <path
+         sodipodi:nodetypes="cccccccccssc"
+         inkscape:connector-curvature="0"
+         id="path6677-3"
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+         style="opacity:0.5;color:#000000;fill:#222222;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:2.79999375;marker:none;visibility:visible;display:inline;overflow:visible;filter:url(#filter8013-4);enable-background:accumulate" />
+    </g>
   </g>
 </svg>