Bootstrap 5 - Event Fixes and Contact Form Captcha

[mickzijdel]

• Add captcha to contact form
• Move the map to the top of the accessibility page
• Add proposal archive link to the admin side bar & move Festivals and Seasons
• Fix ordering of events in the public front end non-archive pages and hide the search form.
• Link to all events on the venue admin page rather than just shows.
• Maps:
  • Replace existing maps (venue show and accessibility/find us) with openstreetmaps using leaflet
  • Add map to admin venue show page
  • Add map with all venues to the admin site
• Set navigation items with a helper instead of the controller so it no longer errors when redirecting between layouts.
• Collapsible search forms. Fixes #163
• Fix adding user to role form.