Fix review problems

- removed superfluous position and classes
- fixed compact view
- fixed event list summary avatar and text overlap
- fixed a problem where the mention list refuses to load.

src/components/structures/MessagePanel.js

@@ -822,7 +822,7 @@ export default class MessagePanel extends React.Component {
 
         let ircResizer = null;
         if (this.state.useIRCLayout) {
-            ircResizer = <IRCTimelineProfileResizer minWidth={20} maxWidth={600} roomId={this.props.room.roomId} />;
+            ircResizer = <IRCTimelineProfileResizer minWidth={20} maxWidth={600} roomId={this.props.room ? this.props.roomroomId : null} />;
         }
 
         return (