Fix action numbers (/handle UI default theme update) (#15840)

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Resources/Textures/Interface/Default/left_arrow.svg

@@ -0,0 +1,66 @@
+<?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"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="12"
+   height="14"
+   viewBox="0 0 12 14"
+   fill="none"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="left_arrow.svg"
+   inkscape:version="1.0.1 (3bc2e813f5, 2020-09-07)"
+   inkscape:export-filename="C:\Users\Pieter-Jan Briers\Projects\space-station-14\Resources\Textures\Interface\Nano\left_arrow.svg.192dpi.png"
+   inkscape:export-xdpi="192"
+   inkscape:export-ydpi="192">
+  <metadata
+     id="metadata10">
+    <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>
+  <defs
+     id="defs8" />
+  <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="1051"
+     id="namedview6"
+     showgrid="false"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-paths="false"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-object-midpoints="false"
+     inkscape:snap-nodes="false"
+     inkscape:snap-page="true"
+     inkscape:zoom="44"
+     inkscape:cx="5.9187161"
+     inkscape:cy="7.8912724"
+     inkscape:window-x="-9"
+     inkscape:window-y="-9"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4" />
+  <path
+     d="M 12,0.072341 0,6.9999997 12,13.927659 Z M 10.859575,11.970212 2.3148933,6.9999997 10.859575,2.0297877 Z"
+     fill="#7b7e9e"
+     id="path2"
+     style="stroke-width:1.41844" />
+</svg>