[AppSwitcher] Add close icon

src/qml/images/closeapp.svg

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<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"
+   version="1.1"
+   id="svg6556"
+   viewBox="0 0 256 256"
+   height="256"
+   width="256">
+  <defs
+     id="defs6558" />
+  <metadata
+     id="metadata6561">
+    <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
+     transform="translate(0,-796.36216)"
+     id="layer1">
+    <g
+       transform="matrix(3.9865374,0,0,3.9865374,3545.0322,305.57444)"
+       id="g7127">
+      <circle
+         r="31.355532"
+         cy="155.21935"
+         cx="-857.14288"
+         style="color:#000000;display:inline;overflow:visible;visibility:visible;fill:#aa0000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1.92615986;marker:none;enable-background:accumulate"
+         id="path10160" />
+      <path
+         id="path10164"
+         d="m -843.61014,141.68666 -27.0654,27.0654"
+         style="display:inline;fill:none;stroke:#ffffff;stroke-width:2.53227282px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+      <path
+         id="path10164-3"
+         d="m -870.67558,141.68665 27.0654,27.0654"
+         style="display:inline;fill:none;stroke:#ffffff;stroke-width:2.53227282px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    </g>
+  </g>
+</svg>