fix notification settings, re #3767

git-svn-id: svn://develop.studip.de/studip/trunk@27784 c5b85792-5220-0410-ad23-ed5b6b8ad999
fix notification settings, re #3767

git-svn-id: svn://develop.studip.de/studip/trunk@27785 c5b85792-5220-0410-ad23-ed5b6b8ad999