RoomVC: BF: Read receipts processing dramatically slows down UI
RoomVC: BF: Read receipts processing dramatically slows down UI

#1899

Fix wrong alignment of read receipts avatars with their message

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