Add icon for calendar color selector

apps/calendar/css/style.css

@@ -60,4 +60,4 @@ select#category{width:140px;}
 button.category{margin:0 3px;}
 
 .calendar-colorpicker-color{display:inline-block;width:20px;height:20px;margin-right:2px;cursor:pointer;}
-.calendar-colorpicker-color.active{background-image:url("../../../core/img/jquery-ui/ui-icons_222222_256x240.png");background-position:-62px -143px;}
+.calendar-colorpicker-color.active{background-image:url("../../../core/img/actions/selected.svg");background-position:2px 2px;}

core/img/actions/selected.svg

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- 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="16"
+   height="16"
+   id="svg3875"
+   version="1.1"
+   inkscape:version="0.48.1 r9760"
+   sodipodi:docname="play.svg"
+   inkscape:export-filename="/home/jancborchardt/owncloud/core/img/actions/play-add.png"
+   inkscape:export-xdpi="90"
+   inkscape:export-ydpi="90">
+  <defs
+     id="defs3877" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="25.345359"
+     inkscape:cx="10.565719"
+     inkscape:cy="5.327912"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     inkscape:window-width="1280"
+     inkscape:window-height="969"
+     inkscape:window-x="-2"
+     inkscape:window-y="-3"
+     inkscape:window-maximized="1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid3883"
+       empspacing="5"
+       visible="true"
+       enabled="true"
+       snapvisiblegridlinesonly="true" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata3880">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0, -1036.36)">
+    <path
+       style="fill:#000000;fill-opacity:1;stroke:none"
+       d="m 14,1038.3622 -6,12 -6,-12 6,6.9978 z"
+       id="path3086"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="ccccc" />
+  </g>
+</svg>