please make this a fixed option in profile / #2527

see add time zone drop down list to person profil

we had a bit of side effects in a few revisions from SVN. the time-offset was not calculated in hourly (or half-hourly?) steps. So we had in booked efforts crude dates like 16:09 tilll 18:09; but the user explicitly put in 16:00 till 18:00! This was perhaps because the server clock was 9min. late!?

Problem is solved forever, if every user has the time-offset in his profile!