Modify icons color

- Update icon from color "2a7fff" to "cccccc"
- Update .svg files with last Inkscape version

rtdata/icons/rawtherapee/scalable/apps/undo.svg

@@ -2,66 +2,16 @@
 <!-- Created with Inkscape (http://www.inkscape.org/) -->
 
 <svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   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="24px"
    height="24px"
    viewBox="0 0 24 24"
    version="1.1"
    id="SVGRoot"
-   inkscape:export-filename="/tmp/template.png"
-   inkscape:export-xdpi="96"
-   inkscape:export-ydpi="96"
-   inkscape:version="0.92.2 2405546, 2018-03-11"
-   sodipodi:docname="undo.svg">
-  <sodipodi:namedview
-     id="base"
-     pagecolor="#E0E1E2"
-     bordercolor="#666768"
-     borderopacity="1.0"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:zoom="34.25"
-     inkscape:cx="12"
-     inkscape:cy="12"
-     inkscape:document-units="px"
-     inkscape:current-layer="layer1"
-     showgrid="true"
-     inkscape:window-width="1920"
-     inkscape:window-height="1019"
-     inkscape:window-x="0"
-     inkscape:window-y="0"
-     inkscape:window-maximized="1"
-     inkscape:grid-bbox="true"
-     inkscape:pagecheckerboard="false"
-     inkscape:snap-bbox="true"
-     inkscape:bbox-nodes="true"
-     inkscape:snap-others="false"
-     inkscape:object-nodes="true"
-     inkscape:snap-grids="true"
-     inkscape:snap-bbox-midpoints="false"
-     inkscape:snap-object-midpoints="true"
-     inkscape:snap-center="true"
-     inkscape:snap-text-baseline="true"
-     inkscape:snap-intersection-paths="true"
-     inkscape:object-paths="true"
-     inkscape:snap-global="true"
-     inkscape:snap-nodes="true"
-     inkscape:snap-midpoints="true"
-     inkscape:snap-smooth-nodes="true">
-    <inkscape:grid
-       type="xygrid"
-       id="grid1374"
-       originx="1"
-       originy="1"
-       empspacing="11"
-       dotted="false" />
-  </sodipodi:namedview>
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:dc="http://purl.org/dc/elements/1.1/">
   <defs
      id="defs815" />
   <metadata
@@ -105,14 +55,10 @@
     </rdf:RDF>
   </metadata>
   <g
-     id="layer1"
-     inkscape:groupmode="layer"
-     inkscape:label="Layer 1">
+     id="layer1">
     <path
-       style="opacity:0.7;fill:#2a7fff;fill-opacity:0.53333285;fill-rule:nonzero;stroke:#2a7fff;stroke-width:1.99999988;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:2.00314951;stroke-opacity:1;paint-order:normal"
+       style="opacity:0.7;fill:#cccccc;fill-opacity:1.0;fill-rule:nonzero;stroke:#cccccc;stroke-width:1.99999988;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:2.00314951;stroke-opacity:1.0;paint-order:normal"
        d="M 6.4858245,9.375818 3.9865811,6.2900625 2.1896046,15.87913 12.154656,16.787898 9.6028372,13.506748 C 15,7 22.153507,11.394278 22.153507,11.394278 c 0,0 -8.111251,-10.3420561 -15.6676825,-2.01846 z"
-       id="path815"
-       inkscape:connector-curvature="0"
-       sodipodi:nodetypes="ccccccc" />
+       id="path815" />
   </g>
 </svg>