refs #3239
- properly encode response-json when editing a posting and remove inproperly displayed title
- move unread-notificator to the right
- forum now working in studygroups out of the box after migration
- make content-migration a bit more tolerant
- fix title generation in mail-notifications


git-svn-id: svn://develop.studip.de/studip/trunk@25795 c5b85792-5220-0410-ad23-ed5b6b8ad999