add login link to SetMxIdDialog

src/components/structures/MatrixChat.js

@@ -682,6 +682,10 @@ module.exports = React.createClass({
                 dis.dispatch({action: 'start_registration'});
                 close();
             },
+            onLoginClick: (ev) => {
+                dis.dispatch({action: 'start_login'});
+                close();
+            },            
         }).close;
     },
 

src/components/structures/RoomView.js

@@ -788,6 +788,10 @@ module.exports = React.createClass({
                     dis.dispatch({action: 'start_registration'});
                     close();
                 },
+                onLoginClick: (ev) => {
+                    dis.dispatch({action: 'start_login'});
+                    close();
+                },
             }).close;
             return;
         }

src/components/views/dialogs/SetMxIdDialog.js

@@ -36,6 +36,8 @@ export default React.createClass({
         onFinished: React.PropTypes.func.isRequired,
         // Called when the user requests to register with a different homeserver
         onDifferentServerClicked: React.PropTypes.func.isRequired,
+        // Called if the user wants to switch to login instead
+        onLoginClick: React.PropTypes.func.isRequired,
     },
 
     getInitialState: function() {
@@ -245,6 +247,9 @@ export default React.createClass({
                             different server
                         </a>.
                     </p>
+                    <p>
+                        If you already have a Matrix account you can <a href="#" onClick={this.props.onLoginClick}>log in</a> instead.
+                    </p>
                     { auth }
                     { authErrorIndicator }
                 </div>