restructure styles
adding styles
new navbar, moving help, cleanup
WIP: layout
layout changes
layout changes
Merge branch 'develop' into feature/startpage

Conflicts:
	assets/classes/startpage.php
updated layout
new layout
updated style
closes #3020
fixed imprint
updated style
update
Merge branch 'feature/startpage' into develop
updated start page
Merge branch 'release/1.58'