update components

dashboard-ui/bower_components/iron-selector/iron-selectable.html

@@ -220,6 +220,15 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       this.selected = this._indexToValue(index);
     },
 
+    /**
+     * Selects the item at the given index.
+     *
+     * @method selectIndex
+     */
+    selectIndex: function(index) {
+      this.select(this._indexToValue(index));
+    },
+
     /**
      * Force a synchronous update of the `items` property.
      *