Basically wrote the whole thing.

static/icons/add.svg

@@ -0,0 +1,31 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="512.000000pt" height="512.000000pt" viewBox="0 0 512.000000 512.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.16, written by Peter Selinger 2001-2019
+</metadata>
+<g transform="translate(0.000000,512.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M2330 5110 c-494 -48 -950 -230 -1350 -538 -195 -150 -448 -432 -594
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+<path d="M2515 3761 c-67 -17 -127 -74 -144 -138 -7 -24 -11 -190 -11 -440 l0
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+</g>
+</svg>