add dark gnome-shell and cinnamon themes

common/gnome-shell/3.18/dark-assets/checkbox/checkbox-unchecked.svg

@@ -48,7 +48,7 @@
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
      inkscape:zoom="11.313709"
-     inkscape:cx="8.4809152"
+     inkscape:cx="-7.3847925"
      inkscape:cy="7.7067432"
      inkscape:document-units="px"
      inkscape:current-layer="layer1"
@@ -82,7 +82,7 @@
         <dc:format>image/svg+xml</dc:format>
         <dc:type
            rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title />
+        <dc:title></dc:title>
       </cc:Work>
     </rdf:RDF>
   </metadata>
@@ -126,7 +126,7 @@
              id="g5400-2-47">
             <rect
                ry="2"
-               style="color:#000000;display:inline;overflow:visible;visibility:visible;fill:#32363d;fill-opacity:1;stroke:#26282d;stroke-width:1;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;enable-background:accumulate"
+               style="color:#000000;display:inline;overflow:visible;visibility:visible;fill:#2d323d;fill-opacity:1;stroke:#262934;stroke-width:1;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;enable-background:accumulate"
                id="rect5147-9-1-5-7-6-3-70"
                width="13"
                height="12.999997"