Extend welcome screen

[k00ni]

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