dialogs: fix nested buttons in links, re #4404

git-svn-id: svn://develop.studip.de/studip/trunk@30593 c5b85792-5220-0410-ad23-ed5b6b8ad999
dialogs: remove debug code from [30593], re #4404

git-svn-id: svn://develop.studip.de/studip/trunk@30594 c5b85792-5220-0410-ad23-ed5b6b8ad999