Log Message:
Update to 4.1.2

Major changes compared to the IMP H3 (4.1.1) version are:
* Allow to toggle off the Virtual Inbox.
* Display quota for current folder on Cyrus servers.
* Updated German, Italian and Spanish translations.
* Several small bugfixes and improvements.

The full list of changes (from version H3 (4.1.1)) can be viewed here:
http://cvs.horde.org/diff.php/imp/docs/CHANGES?r1=1.699.2.184&r2=1.699.2.194&ty=h