message: Convert `setupNotificationListener` to an unbound function
  This isn't called by an event handler directly, so shouldn't need to be bound. Equally, this shouldn't cause any problems.
  This is a long-shot attempt at completing
diff: @@ -401,14 +401,14 @@ export class UnwrappedEventTile extends React.Component<IProps, IState> {
  room?.on(ThreadEvent.New, this.onNewThread);
  }
  - private setupNotificationListener = (thread: Thread): void => {
  + private setupNotificationListener(thread: Thread): void {
  const notifications = RoomNotificationStateStore.instance.getThreadsRoomState(thread.room);
  this.threadState = notifications.getThreadRoomState(thread);
  this.threadState.on(NotificationStateEvents.Update, this.onThreadStateUpdate);
  this.onThreadStateUpdate();
  - };
  + }
  private onThreadStateUpdate = (): void => {
  let threadNotification = null;
  