sem_classes: descriptions for search are now editable, fixes #3742

git-svn-id: svn://develop.studip.de/studip/trunk@27670 c5b85792-5220-0410-ad23-ed5b6b8ad999
fix typos, fixes #3741

git-svn-id: svn://develop.studip.de/studip/trunk@27671 c5b85792-5220-0410-ad23-ed5b6b8ad999