refs #4232

autoresize doesn't return the original textarea but the new one, so we have to add the class at the original before we create the autoresize-textarea

git-svn-id: svn://develop.studip.de/studip/trunk@29651 c5b85792-5220-0410-ad23-ed5b6b8ad999
enhance compatibility re #4070

git-svn-id: svn://develop.studip.de/studip/trunk@29652 c5b85792-5220-0410-ad23-ed5b6b8ad999