[ENHANCEMENT] Setting to block screenshots

[michaeltroger]

trafficstars

Is your feature request related to a problem? Please describe. When you have sensitive documents in the app, then you might want to be sure that no screenshots are taken of them

Describe the solution you'd like A setting to block the taking of screenshots

Describe alternatives you've considered Blocking of screenshots could also be connected to whether fingerprint authentication is enabled. But a separate setting would be the more flexible solution

Additional context To be defined:

• what's the default value
• think also about "recent apps" preview