Added stylelint to static-analysis
Updated yarn dependencies
CSS Fixes and rule adoptions of stylelint
Added stylelint-scss
Deduplicated yarn.lock to clear dependencies
First round of advanced stylelint rules
Mainly Vendor prefix updates related to flex
Updates to more webkit specific vendor prefixes
Finished all vendor specific fixes
Moved now 4 rules to warning
Fixed the new scss lint problems
More stylelint adaptions after rebase
