Added icons.

assets/img/icons/height-short.svg

@@ -0,0 +1,39 @@
+<?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"
+   width="16"
+   height="16"
+   viewBox="0 0 16 16"
+   id="svg10">
+  <metadata
+     id="metadata16">
+    <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>height</dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs14" />
+  <title
+     id="title2">height</title>
+  <path
+     d="m 12,6.3499858 c 0,0.828 -0.672,1.5 -1.5,1.5 -0.828,0 -1.5,-0.672 -1.5,-1.5 0,-0.828 0.672,-1.5 1.5,-1.5 0.828,0 1.5,0.672 1.5,1.5 z"
+     id="path4" />
+  <path
+     d="M 12,8.8752402 H 9 c -0.552,0 -1,0.265991 -1,0.5937299 V 12.43762 H 9 V 16 h 1.25 v -3.56238 h 0.5 V 16 H 12 v -3.56238 h 1 V 9.4689701 C 13,9.1412312 12.552,8.8752402 12,8.8752402 Z"
+     id="path6"
+     style="stroke-width:0.770539" />
+  <path
+     d="M6 1v-1h-5v16h5v-1h-4v-2h2v-1h-2v-2h2v-1h-2v-2h2v-1h-2v-2h2v-1h-2v-2z"
+     id="path8" />
+</svg>