Add cross icon (#1034)

ext/mixed/img/cross.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8"?><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M3.5605 1.4395L1.4394 3.5606l4.4395 4.4395-4.4395 4.4395 2.1211 2.1211L8 10.1212l4.1895 4.4395 2.1211-2.1211-4.1895-4.4395 4.1895-4.4395-2.1211-2.1211L8 5.879z" fill="#333"/></svg>

resources/icons.svg

@@ -27,11 +27,11 @@
      borderopacity="1.0"
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
-     inkscape:zoom="32"
+     inkscape:zoom="45.254834"
-     inkscape:cx="10.206786"
+     inkscape:cx="10.082978"
-     inkscape:cy="7.8060109"
+     inkscape:cy="9.0525289"
      inkscape:document-units="px"
-     inkscape:current-layer="layer45"
+     inkscape:current-layer="g1049"
      showgrid="true"
      units="px"
      inkscape:snap-center="true"
@@ -56,6 +56,11 @@
        spacingx="0.25"
        spacingy="0.25"
        dotted="false" />
+    <sodipodi:guide
+       position="-0.66291261,0"
+       orientation="1,0"
+       id="guide1067"
+       inkscape:locked="false" />
   </sodipodi:namedview>
   <defs
      id="defs2">
@@ -517,7 +522,7 @@
         <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>
@@ -1316,7 +1321,8 @@
   <g
      inkscape:groupmode="layer"
      id="layer45"
-     inkscape:label="Popup Size">
+     inkscape:label="Popup Size"
+     style="display:none">
     <path
        style="fill:#000000;fill-opacity:1;stroke:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:normal"
        d="M 2,6 C 1.446,6 1,6.446 1,7 v 5 c 0,0.554 0.446,1 1,1 h 1 v 2 L 4.5,13 H 11 c 0.554,0 1,-0.446 1,-1 V 7 C 12,6.446 11.554,6 11,6 Z M 2,7 H 4.5 V 8 H 3 V 9.5 H 2 Z m 8,2.5 h 1 V 12 H 8.5 V 11 H 10 Z"
@@ -1429,4 +1435,16 @@
        x="14"
        y="1" />
   </g>
+  <g
+     style="display:inline"
+     inkscape:groupmode="layer"
+     id="g1049"
+     inkscape:label="Cross">
+    <path
+       style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-feature-settings:normal;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;writing-mode:lr-tb;direction:ltr;text-orientation:mixed;dominant-baseline:auto;baseline-shift:baseline;text-anchor:start;white-space:normal;shape-padding:0;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;vector-effect:none;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
+       d="M 3.5605469,1.4394531 1.4394531,3.5605469 5.8789062,8 1.4394531,12.439453 3.5605469,14.560547 8,10.121094 12.189453,14.560547 14.310547,12.439453 10.121094,8 14.310547,3.5605469 12.189453,1.4394531 8,5.8789062 Z"
+       id="path1047"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="ccccccccccccc" />
+  </g>
 </svg>