Notification of nick already used
If I am connected twice to a chatroom from two different places, with two nick different (BellChan at home, Edtech at the office for example), when I am disconnected at the office, Gajim joined the chatroom with the nick previously used (Edtech) but ask to modify because BellChan is already used and BellChan_ proposes to me.
Sometimes Gajim announces to me that I am already in this living room and does not ask to change nick.