Voucher can hide a ticket type

Hi run.events,

we used Vouchers to invite Speakers, Sponsors etc to our event, revealing some hidden Ticket types.

The issue we noticed is that the standard (default free Atendee) Ticket Type is always available and the voucher could only show one or more hidden Types, is not possible to hide a Type.

We've many Sponsors and Speakers that used the Voucher to show their dedicated Ticket type, but ordered the Attendee ticket anyway! (no comment) :-(

To avoid this issue, it'll be useful to be able to also hide a Ticket Type with a Voucher.

Thanks
Luca