Added Slovenian translation
Added sl for Slovenian translation
Updated Czech translation
Added Serbian translation
Updated Hungarian translation
Added German translation
Added Galician translation
Updated Spanish translation
Create/Update Event dialog calendar index mismatch: Closes bgo#727042

If calendar(s) are disabled/invisible in the calendar manager, there
could be an index mismatch between the combo list and the list of
active calendars.  This meant creating or updating a calendar could
occur on the wrong one, potentially leading to permission problems.
Handle libical's tzid prefix

Some users of libical generate iCal components with its tzid prefix.
This catches those situations and converts the prefixed tzid into
a proper Olson zone.
Merge branch 'master' into wip/727120-webcal