Implement PasswordNagBar

This will tell the user that they need to set a password to return to their account.

src/components/views/globals/PasswordNagBar.js

@@ -0,0 +1,47 @@
+/*
+Copyright 2017 Vector Creations 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.
+*/
+
+'use strict';
+
+import React from 'react';
+import sdk from 'matrix-react-sdk';
+import Modal from 'matrix-react-sdk/lib/Modal';
+
+export default React.createClass({
+    onUpdateClicked: function() {
+        // TODO: Implement dialog to set password
+        // const SetPasswordDialog = sdk.getComponent('dialogs.SetPasswordDialog');
+        // Modal.createDialog(SetPasswordDialog, {
+        //     onFinished: () => {
+        //     }
+        // });
+    },
+
+    render: function() {
+        const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
+        return (
+            <div className="mx_MatrixToolbar">
+                <img className="mx_MatrixToolbar_warning" src="img/warning.svg" width="24" height="23" alt="/!\"/>
+                <div className="mx_MatrixToolbar_content">
+                    To be able to return to your account, you need to set a password.
+                </div>
+                <button className="mx_MatrixToolbar_action" onClick={this.onUpdateClicked}>
+                    Set Password
+                </button>
+            </div>
+        );
+    }
+});