Join groupchat usability improvements
I much prefer not having to select an account in the "Join Groupchat" dialog, so Gajim using the correct account in every case is very useful. You applied a patch of mine already for the /join command, and attached is a patch which also fixes it for the right-click menu.
However if Gajim always specifies the account to the dialog, then the new account selector in the dialog is useless, because it would never be shown. The second attached patch changes the behaviour so that the selector is always shown, but instead of forcing the user to select an account, it pre-selects the account passed to the dialog by the caller, meaning no extra action is required of the user.
I'm going to upset johnny by opening a ticket for 0.13, but we have patches, and this is a small but annoying issue I'd like to see fixed :)