Adds an SVG checksign

Because Roboto does not have a checksign in its charachter set

Contributes to #CURA-244

resources/themes/cura/icons/check.svg

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<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"
+   version="1.1"
+   id="Capa_1"
+   x="0px"
+   y="0px"
+   width="415.582px"
+   height="415.582px"
+   viewBox="0 0 415.582 415.582"
+   style="enable-background:new 0 0 415.582 415.582;"
+   xml:space="preserve"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="check.svg"><metadata
+     id="metadata11"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+     id="defs9" /><sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1134"
+     id="namedview7"
+     showgrid="false"
+     inkscape:zoom="1.61"
+     inkscape:cx="211.31288"
+     inkscape:cy="137.35337"
+     inkscape:window-x="1440"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="Capa_1" /><g
+     id="g3"><path
+       d="m 411.47,96.426 -34.319,-34.32 c -5.48192,-5.482079 -14.34421,-5.455083 -19.853,0 L 152.348,265.058 56.282,174.994 c -5.48,-5.482 -14.37,-5.482 -19.851,0 l -32.319,32.32 c -5.482,5.481 -5.482,14.37 0,19.852 l 138.311,138.31 c 2.741,2.742 6.334,4.112 9.926,4.112 3.593,0 7.186,-1.37 9.926,-4.112 L 411.47,116.277 c 2.633,-2.632 4.111,-6.203 4.111,-9.925 10e-4,-3.724 -1.47804,-7.29296 -4.111,-9.926 z"
+       id="path5"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="sssccccscscccs" /></g></svg>