FR: Allow admin to decide if PGP or S/MIME is to be preferred if both are active

Title: Allow admin to decide if PGP or S/MIME is to be preferred if both are active.

1. What is your original issue/pain point you want to solve?
   You cannot overcome Zammads default behavior to prefer S/MIME over PGP should both integrations be active. If you e.g. want to be able to receive S/MIME content with the option to verify it, you would have to manually switch to PGP all the time if that’s your preferred way to sign emails.

2. Which are one or two concrete situations where this problem hurts the most?
   Having the agent to remember and actively change to PGP in any single article they send via mail to the customer.

3. Why is it not solvable with the Zammad standard?
   It’s a hardcoded prefered option

       if @securityTypeShown()
         @$('.js-securityType[data-type="PGP"]').removeClass('btn--active')
         @$('.js-securityType[data-type="S/MIME"]').addClass('btn--active') # S/MIME is preferred type
         @$('.js-securityType').show()
   

4. What is your expectation/what do you want to achieve?
   A (maybe group based) option that defaults to S/MIME but allows admins to actually switch it to PGP so that the default favored S/MIME setting can be overruled.

Your Zammad environment:

• Average concurrent agent count: 10
• Average tickets a day: 50
• What roles/people are involved: Agents and Admins

Anything else which you think is useful to understand your use case:
This currently works as designed but in some scenarios you might want to have power over this “external decision”.

Context:

Thank you and have fun.