fixes #3259

git-svn-id: svn://develop.studip.de/studip/trunk@25583 c5b85792-5220-0410-ad23-ed5b6b8ad999
refs #3239
* add infotext with link to help to infobox
* set correct help-keyword
* replace js-function confirm by Stud.IP-confirm-dialog
* add shadows to move-thread-dialog and postings


git-svn-id: svn://develop.studip.de/studip/trunk@25584 c5b85792-5220-0410-ad23-ed5b6b8ad999