Sync typing indication with avatar typing indication

Follow the same rules for displaying "is typing" as with the typing avatars.

src/components/structures/RoomView.js

@@ -1531,6 +1531,7 @@ module.exports = React.createClass({
                 onResize={this.onChildResize}
                 onVisible={this.onStatusBarVisible}
                 onHidden={this.onStatusBarHidden}
+                whoIsTypingLimit={2}
             />;
         }