An option to disable 'personal' tickets & all tickets in one pdf

**Is your feature request related to a problem? Please describe.**
I've used Alf.io for theater performances for the past 3 years. And one of the things the attendees struggle with every year is their ticket. Because what happens is the following: One person buys the for the whole group, but needs to assign them to the others. The problem is that that's not necessary for this type of event and the tickets get distributed over the group.

**Describe the solution you'd like**
What I would like to see, is an option to disable 'personal' tickets and sending all the tickets as one PDF to the buyer.