re #4063
minor corrections

git-svn-id: svn://develop.studip.de/studip/trunk@29753 c5b85792-5220-0410-ad23-ed5b6b8ad999
re #4063
honor the parents

git-svn-id: svn://develop.studip.de/studip/trunk@29754 c5b85792-5220-0410-ad23-ed5b6b8ad999