js translation: prepare strings for better translation, re #4919

git-svn-id: svn://develop.studip.de/studip/trunk@32035 c5b85792-5220-0410-ad23-ed5b6b8ad999
js translation: add cli tool to extract localizable strings from js, re #4919

git-svn-id: svn://develop.studip.de/studip/trunk@32036 c5b85792-5220-0410-ad23-ed5b6b8ad999