Ticketing afgewerkt + alle comboboxen correct binden
Revert "Ticketing afgewerkt + alle comboboxen correct binden"

This reverts commit 08c92f1c010953656be19ec949deda7d5d0ce832.
Wijzigingen

models: Band, Festival, Genre, Ticket, TicketType
views: Contact, Home, LineUp, Ticketing
viewmodels: ContactVM