[Displays icons in message window showing whether your last outgoing message was read / is still unread.] [MessageState unread extra icon] [Unread message icon] [Read message icon] [Failed sending icon] [Sending message icon] [Unread clist extra icon] [Last message is not read] [Last message read] [Last message was not sent] [Last message read at %X %x] [Last message read (unknown time)]