Fix: add missing assets

assets/svg/cross.svg

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   width="7"
+   height="7"
+   viewBox="0 0 7 7"
+   version="1.1"
+   id="svg7"
+   sodipodi:docname="cross.svg"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs11" />
+  <sodipodi:namedview
+     id="namedview9"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="80.206863"
+     inkscape:cx="4.0270868"
+     inkscape:cy="2.6493992"
+     inkscape:window-width="1920"
+     inkscape:window-height="995"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg7" />
+  <path
+     style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.50314403"
+     d="M 0,3.5 H 7"
+     id="path941" />
+      <path
+     style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.50314403"
+     d="M 3.5,0 V 7"
+     id="path941" />
+</svg>

assets/svg/cross.svg.license

@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: Pieter Vander Vennet
+SPDX-License-Identifier: CC0