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

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

Resources/Textures/Interface/Default/right_arrow.svg

@@ -0,0 +1,69 @@
+<?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="right_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\right_arrow.svg.192dpi.png"
+   inkscape:export-xdpi="193.91678"
+   inkscape:export-ydpi="193.91678">
+  <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 />
+      </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"
+     scale-x="1"
+     viewbox-width="11"
+     viewbox-height="11.5"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0"
+     inkscape:zoom="43.999999"
+     inkscape:cx="9.3222643"
+     inkscape:cy="6.5346476"
+     inkscape:window-x="-9"
+     inkscape:window-y="-9"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg4"
+     inkscape:document-rotation="0"
+     inkscape:snap-page="true" />
+  <path
+     d="M 12,7.0000003 0,0.07234076 V 13.927659 Z m -2.3148935,0 -8.544681,4.9702107 V 2.0297876 Z"
+     fill="#7b7e9e"
+     id="path2"
+     style="stroke-width:1.41843" />
+</svg>