fix image loading

dashboard-ui/thirdparty/paper-behaviors/paper-inky-focus-behavior.html

@@ -0,0 +1,44 @@
+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../iron-behaviors/iron-button-state.html">
+
+<script>
+
+  /**
+   * `Polymer.PaperInkyFocusBehavior` implements a ripple when the element has keyboard focus.
+   *
+   * @polymerBehavior Polymer.PaperInkyFocusBehavior
+   */
+  Polymer.PaperInkyFocusBehaviorImpl = {
+
+    observers: [
+      '_focusedChanged(receivedFocusFromKeyboard)'
+    ],
+
+    _focusedChanged: function(receivedFocusFromKeyboard) {
+      if (!this.$.ink) {
+        return;
+      }
+
+      this.$.ink.holdDown = receivedFocusFromKeyboard;
+    }
+
+  };
+
+  /** @polymerBehavior Polymer.PaperInkyFocusBehavior */
+  Polymer.PaperInkyFocusBehavior = [
+    Polymer.IronButtonState,
+    Polymer.IronControlState,
+    Polymer.PaperInkyFocusBehaviorImpl
+  ];
+
+</script>