Icon tweaks and cleanup

- Color-unranked icons tweaked for lighter themes, closes #4704
- Star-unranked icons smaller to increase contrast, #4469
- Deleted old icons which snuck back in with the ICC geneartor merge.

rtdata/images/themed/svg/gamut-plus.svg

@@ -17,7 +17,7 @@
    inkscape:export-filename="/tmp/template.png"
    inkscape:export-xdpi="96"
    inkscape:export-ydpi="96"
-   inkscape:version="0.92.3 (2405546, 2018-03-11)"
+   inkscape:version="0.92.2 2405546, 2018-03-11"
    sodipodi:docname="gamut-plus.svg">
   <sodipodi:namedview
      id="base"
@@ -26,16 +26,16 @@
      borderopacity="1.0"
      inkscape:pageopacity="0"
      inkscape:pageshadow="2"
-     inkscape:zoom="16.916667"
-     inkscape:cx="10.814802"
-     inkscape:cy="13.644321"
+     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="1018"
-     inkscape:window-x="-8"
-     inkscape:window-y="-8"
+     inkscape:window-height="1019"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
      inkscape:window-maximized="1"
      inkscape:grid-bbox="true"
      inkscape:pagecheckerboard="false"