sidebar/helpbar: hide on printout, re #3768, fixes #4444

git-svn-id: svn://develop.studip.de/studip/trunk@30736 c5b85792-5220-0410-ad23-ed5b6b8ad999
dialogs: encode title, re #4404, fixes #4442

git-svn-id: svn://develop.studip.de/studip/trunk@30738 c5b85792-5220-0410-ad23-ed5b6b8ad999