RoomVC: Prevent tableView scroll when displaying contextual menu (Fix #2687).
RoomVC: Prevent tableView scroll when displaying contextual menu (Fix #2687).

vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios