Add the ability to convert a non-e-ticketed event into an e-ticketed event and then send the tickets to previous bookings for the experience.

Sometimes we want to convert a non-e-ticketed event into a ticketed event so we can have ticket images and QR codes to scan. For example, if we forget to turn that feature on but sell bookings, at some point during or after the sales have happened, we want to convert those customers into ticketed customers. Require an action on the part of the merchant to retroactively create those tickets and then have a means of sending them to the customer.