Group chat creation fails if no account is active
Group chat creation fails on current master if no account is active.
Traceback (most recent call last):
File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/app_actions.py", line 117, in on_create_gc
open_window('CreateGroupchatWindow', account=account or None)
File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/gtk/util.py", line 723, in open_window
window = window_cls(**kwargs)
File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/gtk/groupchat_creation.py", line 55, in __init__
self._fill_placeholders()
File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/gtk/groupchat_creation.py", line 96, in _fill_placeholders
server = app.get_muc_domain(self._account) or 'muc.example.com'
File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/common/app.py", line 600, in get_muc_domain
return connections[account].muc_jid.get('jabber', None)
KeyError: None