Add an "Edit"-button to the "Accounts"-window
Current situation in Gajim 0.99.2: You can edit an account by clicking on the account's name in the "Accounts"-window. That's bad UI-design since the edit function is basically hidden from the view. Contrary to that removing and enabling/disabling an account both got their own buttons.
Proposal: Add an "Edit"-button right next to the "Remove"-button.