Extend welcome screen

[k00ni]

• add pre-selection:
  • [x] for blind and visually impaired
  • [x] hide map component
  • [x] for movement impaired (e.g. wheelchair, ...)
  • [x] preselect only "teilweise rollstuhlgerecht"
  • [x] for hear impaired
  • [x] select only "Hilfestellungen vor Ort für Sehbehinderte"
  • [x] no preselection