Refactor UI error effects

And add error effects to the login page to be consistent with the registration page

src/UiEffects.js

@@ -0,0 +1,27 @@
+/*
+Copyright 2016 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/**
+ * Functions for applying common thematic effects to  UI elements.
+ * Ideally this would be themeable.
+ */
+
+import Velocity from 'velocity-vector';
+import 'velocity-vector/velocity.ui';
+
+export function field_input_incorrect(element) {
+    Velocity(element, "callout.shake", 300);
+}