2 new icons: `deselect`, `select-all`

src/_icons/deselect.svg

@@ -0,0 +1,21 @@
+---
+---
+<svg>
+  <path d="M12 8h3a1 1 0 0 1 1 1v3" />
+  <path d="M16 16h-7a1 1 0 0 1 -1 -1v-7" />
+  <path d="M12 20v.01" />
+  <path d="M16 20v.01" />
+  <path d="M8 20v.01" />
+  <path d="M4 20v.01" />
+  <path d="M4 16v.01" />
+  <path d="M4 12v.01" />
+  <path d="M4 8v.01" />
+  <path d="M8 4v.01" />
+  <path d="M12 4v.01" />
+  <path d="M16 4v.01" />
+  <path d="M20 4v.01" />
+  <path d="M20 8v.01" />
+  <path d="M20 12v.01" />
+  <path d="M20 16v.01" />
+  <path d="M3 3l18 18" />
+</svg>

src/_icons/select-all.svg

@@ -0,0 +1,21 @@
+---
+---
+<svg>
+  <path d="M8 8m0 1a1 1 0 0 1 1 -1h6a1 1 0 0 1 1 1v6a1 1 0 0 1 -1 1h-6a1 1 0 0 1 -1 -1z" />
+  <path d="M12 20v.01" />
+  <path d="M16 20v.01" />
+  <path d="M8 20v.01" />
+  <path d="M4 20v.01" />
+  <path d="M4 16v.01" />
+  <path d="M4 12v.01" />
+  <path d="M4 8v.01" />
+  <path d="M4 4v.01" />
+  <path d="M8 4v.01" />
+  <path d="M12 4v.01" />
+  <path d="M16 4v.01" />
+  <path d="M20 4v.01" />
+  <path d="M20 8v.01" />
+  <path d="M20 12v.01" />
+  <path d="M20 16v.01" />
+  <path d="M20 20v.01" />
+</svg>