re #3768, #4635

revert changes for this file from [31502]

git-svn-id: svn://develop.studip.de/studip/trunk@31504 c5b85792-5220-0410-ad23-ed5b6b8ad999
fixes #4490 fixes #4584

git-svn-id: svn://develop.studip.de/studip/trunk@31505 c5b85792-5220-0410-ad23-ed5b6b8ad999