re #4483

add copying

git-svn-id: svn://develop.studip.de/studip/trunk@31204 c5b85792-5220-0410-ad23-ed5b6b8ad999
helpbar: allow helpbar to not be rendered at all, re #3768

git-svn-id: svn://develop.studip.de/studip/trunk@31205 c5b85792-5220-0410-ad23-ed5b6b8ad999