Partly fix #995:  Bevestiging vragen bij onomkeerbare aanpassingen events.
Removed the default inline delete option in the admin and replaced it with a delete link. An event option can only be deleted when it is not yet used in registrations.
Partly fix #995:  Bevestiging vragen bij onomkeerbare aanpassingen events.
Removed the default inline delete question in the admin and replaced it with a delete link.
Renamed function to reflect what it does. Does not delete an event, but an event option.