add minus-small icon

app/assets/stylesheets/svg-dimensions.css

@@ -36,6 +36,7 @@
 .icon-magnifier { width: 15px; height: 15px; }
 .icon-marker { width: 17px; height: 19px; }
 .icon-message { width: 24px; height: 24px; }
+.icon-minus-small { width: 16px; height: 16px; }
 .icon-minus { width: 20px; height: 20px; }
 .icon-mood-bad { width: 60px; height: 59px; }
 .icon-mood-good { width: 60px; height: 59px; }

public/assets/images/icons/minus-small.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="16px" height="16px" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns">
+    <!-- Generator: Sketch 3.3.3 (12072) - http://www.bohemiancoding.com/sketch -->
+    <title>minus-small</title>
+    <desc>Created with Sketch.</desc>
+    <defs></defs>
+    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" sketch:type="MSPage">
+        <g id="minus-small" sketch:type="MSArtboardGroup" fill="#50E3C2">
+            <path d="M3,7 L3,9 L13,9 L13,7 L3,7 Z" id="Shape" sketch:type="MSShapeGroup"></path>
+        </g>
+    </g>
+</svg>