Update SVG files for icons with proper XML headers and formatting

icons/LICENSE

@@ -1,3 +1,7 @@
+The icons in this folder are adapted from remixicon, licensed under the Apache License.
+
+---
+
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/

icons/microsoft.svg

@@ -1 +1,25 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M11.501 3V11.5H3.00098V3H11.501ZM11.501 21H3.00098V12.5H11.501V21ZM12.501 3H21.001V11.5H12.501V3ZM21.001 12.5V21H12.501V12.5H21.001Z"></path></svg>
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" version="1.1"
+     xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <linearGradient id="Gradient" x1="0" x2="0" y1="0" y2="1">
+      <stop offset="0%" style="stop-color:#3584E4;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#1A5FB4;stop-opacity:1" />
+    </linearGradient>
+    <filter id="alpha-to-white">
+      <feColorMatrix in="SourceGraphic" type="matrix"
+                     values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0"/>
+    </filter>
+    <g id="child-svg"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" height="16px" width="16px"><path d="M11.501 3V11.5H3.00098V3H11.501ZM11.501 21H3.00098V12.5H11.501V21ZM12.501 3H21.001V11.5H12.501V3ZM21.001 12.5V21H12.501V12.5H21.001Z" /></svg></g>
+  </defs>
+  <rect
+      width="256"
+      height="256"
+      fill="url(#Gradient)"
+      ry="128"
+      x="0"
+      y="0" />
+  <use xlink:href="#child-svg" filter="url(#alpha-to-white)"
+       transform="matrix(8,0,0,8,64,64)" />
+</svg>

icons/restart.svg

@@ -1 +1,25 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 22C6.47715 22 2 17.5228 2 12C2 6.47715 6.47715 2 12 2C17.5228 2 22 6.47715 22 12C22 17.5228 17.5228 22 12 22ZM16.8201 17.0761C18.1628 15.8007 19 13.9981 19 12C19 8.13401 15.866 5 12 5C8.13401 5 5 8.13401 5 12C5 15.866 8.13401 19 12 19C13.0609 19 14.0666 18.764 14.9676 18.3417L13.9928 16.5871C13.3823 16.8527 12.7083 17 12 17C9.23858 17 7 14.7614 7 12C7 9.23858 9.23858 7 12 7C14.7614 7 17 9.23858 17 12H14L16.8201 17.0761Z"></path></svg>
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" version="1.1"
+     xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <linearGradient id="Gradient" x1="0" x2="0" y1="0" y2="1">
+      <stop offset="0%" style="stop-color:#E5A50A;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#26A269;stop-opacity:1" />
+    </linearGradient>
+    <filter id="alpha-to-white">
+      <feColorMatrix in="SourceGraphic" type="matrix"
+                     values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0"/>
+    </filter>
+    <g id="child-svg"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" height="16px" width="16px"><path d="M12 22C6.47715 22 2 17.5228 2 12C2 6.47715 6.47715 2 12 2C17.5228 2 22 6.47715 22 12C22 17.5228 17.5228 22 12 22ZM16.8201 17.0761C18.1628 15.8007 19 13.9981 19 12C19 8.13401 15.866 5 12 5C8.13401 5 5 8.13401 5 12C5 15.866 8.13401 19 12 19C13.0609 19 14.0666 18.764 14.9676 18.3417L13.9928 16.5871C13.3823 16.8527 12.7083 17 12 17C9.23858 17 7 14.7614 7 12C7 9.23858 9.23858 7 12 7C14.7614 7 17 9.23858 17 12H14L16.8201 17.0761Z" /></svg></g>
+  </defs>
+  <rect
+      width="256"
+      height="256"
+      fill="url(#Gradient)"
+      ry="128"
+      x="0"
+      y="0" />
+  <use xlink:href="#child-svg" filter="url(#alpha-to-white)"
+       transform="matrix(8,0,0,8,64,64)" />
+</svg>