Revert "remove unnessary manual focussing of composer"

This reverts commit 57abbc4273.

src/components/structures/MatrixChat.js

@@ -268,6 +268,8 @@ export default React.createClass({
     componentDidMount: function() {
         this.dispatcherRef = dis.register(this.onAction);
 
+        this.focusComposer = false;
+
         // this can technically be done anywhere but doing this here keeps all
         // the routing url path logic together.
         if (this.onAliasClick) {
@@ -360,6 +362,10 @@ export default React.createClass({
             const durationMs = this.stopPageChangeTimer();
             Analytics.trackPageChange(durationMs);
         }
+        if (this.focusComposer) {
+            dis.dispatch({action: 'focus_composer'});
+            this.focusComposer = false;
+        }
     },
 
     startPageChangeTimer() {
@@ -787,6 +793,8 @@ export default React.createClass({
     //                               that has been passed out-of-band (eg.
     //                               room name and avatar from an invite email)
     _viewRoom: function(roomInfo) {
+        this.focusComposer = true;
+
         const newState = {
             view: VIEWS.LOGGED_IN,
             currentRoomId: roomInfo.room_id || null,
@@ -1360,6 +1368,7 @@ export default React.createClass({
             self.firstSyncComplete = true;
             self.firstSyncPromise.resolve();
 
+            dis.dispatch({action: 'focus_composer'});
             self.setState({
                 ready: true,
                 showNotifierToolbar: Notifier.shouldShowToolbar(),