message: Add comment to explain hacky optimism
diff: @@ -79,6 +79,11 @@ class RoomListStore extends Store {
  }
  break;
  case 'RoomListActions.tagRoom.pending': {
  + // XXX: we only show one optimistic update at any one time.
  + // Ideally we should be making a list of in-flight requests
  + // that are backed by transaction IDs. Until the js-sdk
  + // supports this, we're stuck with only being able to use
  + // the most recent optimistic update.
  this._generateRoomLists(payload.request);
  }
  break;
  