add documentation re #4063

git-svn-id: svn://develop.studip.de/studip/trunk@29576 c5b85792-5220-0410-ad23-ed5b6b8ad999
replaced Config::GetInstance()->getValue($) calls by Config::get()->$ calls for WYSIWYG; re #4068

git-svn-id: svn://develop.studip.de/studip/trunk@29578 c5b85792-5220-0410-ad23-ed5b6b8ad999