hide invisible institute members for all users except admins, fixes #2486

git-svn-id: svn://develop.studip.de/studip/trunk@27413 c5b85792-5220-0410-ad23-ed5b6b8ad999
hide invisible institute members for all users except admins, fixes #2486

git-svn-id: svn://develop.studip.de/studip/trunk@27414 c5b85792-5220-0410-ad23-ed5b6b8ad999