data: Add a custom icon for Favorites

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

data/hicolor/scalable/apps/emmental-favorites.svg

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="512"
+   height="512"
+   viewBox="0 0 135.46666 135.46666"
+   version="1.1"
+   id="svg3294"
+   inkscape:version="1.1 (c4e8f9ed74, 2021-05-24)"
+   sodipodi:docname="emmental-favorites.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview3296"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:document-units="px"
+     showgrid="false"
+     width="512mm"
+     units="px"
+     inkscape:zoom="1"
+     inkscape:cx="416.5"
+     inkscape:cy="263.5"
+     inkscape:window-width="1920"
+     inkscape:window-height="1005"
+     inkscape:window-x="0"
+     inkscape:window-y="49"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer2"
+     showborder="true"
+     borderlayer="false" />
+  <defs
+     id="defs3291">
+    <linearGradient
+       id="linearGradient3404"
+       inkscape:swatch="solid">
+      <stop
+         style="stop-color:#ff0000;stop-opacity:1;"
+         offset="0"
+         id="stop3402" />
+    </linearGradient>
+  </defs>
+  <g
+     inkscape:groupmode="layer"
+     id="layer2"
+     inkscape:label="Layer 2"
+     style="display:inline">
+    <path
+       id="rect928"
+       style="mix-blend-mode:multiply;fill:#ff0000;fill-opacity:1;fill-rule:nonzero;stroke:#004600;stroke-width:1.13263;stroke-dasharray:0, 12.4589;stroke-opacity:1;paint-order:markers fill stroke"
+       d="M 8.3491862,17.674821 A 48.298388,38.079963 55.167577 0 0 0.47527528,35.642866 48.298388,38.079963 55.167577 0 0 15.646486,80.346627 l 13.02172,14.124094 26.043443,28.248199 c 7.214034,7.82476 18.829408,7.82476 26.043442,0 L 106.79853,94.470721 119.82026,80.346627 A 38.079963,48.298388 34.832423 0 0 126.33111,16.788177 38.079963,48.298388 34.832423 0 0 67.73337,23.850231 48.298388,38.079963 55.167577 0 0 26.518717,7.3946768 48.298388,38.079963 55.167577 0 0 8.3491862,17.674821 Z" />
+  </g>
+</svg>

ui/test_icons.py

@@ -18,3 +18,4 @@ class TestUIIcons(unittest.TestCase):
 
         self.assertIn(str(Path), icons.Theme.get_search_path())
         self.assertTrue(icons.Theme.has_icon("emmental"))
+        self.assertTrue(icons.Theme.has_icon("emmental-favorites"))