sidebar: extend search widget with a quick search option, fixes #5047

git-svn-id: svn://develop.studip.de/studip/trunk@32747 c5b85792-5220-0410-ad23-ed5b6b8ad999
use search widget with quick search option in user administration, re #5047

git-svn-id: svn://develop.studip.de/studip/trunk@32748 c5b85792-5220-0410-ad23-ed5b6b8ad999