sidebar: respect retina for list icons, fixes #4703

git-svn-id: svn://develop.studip.de/studip/trunk@31642 c5b85792-5220-0410-ad23-ed5b6b8ad999
sidebar: respect retina for list icons, fixes #4703

git-svn-id: svn://develop.studip.de/studip/trunk@31643 c5b85792-5220-0410-ad23-ed5b6b8ad999