Issue #3155464 by elij, quinns: navbar-toggler-icon not appearing

css/components/icons.css

@@ -24,3 +24,8 @@
   direction: ltr;
   height: 16px;
 }
+
+/* Menu toggler fall back icon */
+.navbar-toggler-icon {
+  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.5%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
+}