Fix display when sending message to a full JID
This path fixes a regression in mcabber 1.1.1.
The message was shown as if it was a MUC private message.
Thanks to Minoru for the report.
[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=MCabber
GenericName=Jabber IM Client
Comment=Console Jabber Client
Exec=mcabber
Terminal=true
Categories=ConsoleOnly;System;Network;InstantMessaging;Chat;