UI enhancements

• Apply bigger margins between community headers and images. Fixes overlaps in the mobile version
• Add sidebar missing links
• Apply header to settings submenu in sidebar

This Merge Request:

• Closes https://gitlab.tuwien.ac.at/fairdata/inveniordm-tuw/-/issues/54
• Closes https://gitlab.tuwien.ac.at/fairdata/inveniordm-tuw/-/issues/55

requested review from @maximilian.moser

assigned to @maximilian.moser and @sotirios.tsepelakis

approved this merge request

merged