Log Message:
Update to 0.7.4.  List of changes (but not complete):

News in 0.7.3:
* Fix transient window behaviour, Mikael.
* Fix bugs with the flashing icons, Richard.
* Propagate status updates to group chat, Martyn Russell.
* Show dialog when authentication fails. Martyn, Richard.
* Behave better when the notification area is removed, Qball Cow.
* Plug leaks, Richard.
* Updated translations (cs, da, eu, fr, nl, sr, sr@Latn, sv)