Bit more robust icon loading

src/home-assistant.js

@@ -54,9 +54,12 @@ export default new Polymer({
   },
 
   loadIcons() {
+    // If the import fails, we'll try to import again, must be a server glitch
+    // Since HTML imports only resolve once, we import another url.
+    const success = () => this.iconsLoaded = true;
     this.importHref(`/static/mdi-${this.icons}.html`,
-                    () => this.iconsLoaded = true,
-                    () => this.loadIcons());
+                    success,
+                    this.importHref(`/static/mdi.html`, success, success));
   },
 
   ready() {