The "+" button is confusing

First of all, thank you for all your work on this important project! Now, there's one issue that stuck up to me in the GUI that I'd like to address

The "+" button above the contact doesn't have a clear purpose. When I send someone my Jami nick, the instinct is often to press the "+" button (as one can assume it means "add new contact", hence the "+"), but then nothing happens - it looks like a bug then!

I'd suggest removing the button, because as far as I can tell its purpose is identical to just pressing "enter" when typing a username