Do not send the room with action

By not sending the room with the action, we prevent its state from being updated by registered views listening for on_room_read

src/components/structures/TimelinePanel.js

@@ -476,9 +476,10 @@ var TimelinePanel = React.createClass({
         // if we are scrolled to the bottom, do a quick-reset of our unreadNotificationCount
         // to avoid having to wait from the remote echo from the homeserver.
         if (this.isAtEndOfLiveTimeline()) {
+            this.props.timelineSet.room.setUnreadNotificationCount('total', 0);
+            this.props.timelineSet.room.setUnreadNotificationCount('highlight', 0);
             dis.dispatch({
                 action: 'on_room_read',
-                room: this.props.timelineSet.room,
             });
         }
 

src/components/views/rooms/RoomList.js

@@ -97,9 +97,9 @@ module.exports = React.createClass({
                 }
                 break;
             case 'on_room_read':
-                payload.room.setUnreadNotificationCount('total', 0);
-                payload.room.setUnreadNotificationCount('highlight', 0);
-                // Force an update because this state is too deep to cause an update
+                // Force an update because the notif count state is too deep to cause
+                // an update. This forces the local echo of reading notifs to be
+                // reflected by the RoomTiles.
                 this.forceUpdate();
                 break;
         }