Deactivate Snooze on Ajax background trigger

[JohannesGGE]

Is your feature request related to a problem? Please describe.

Contributes to: #2048

Describe the solution you'd like

If Ajax is selected as a background-job trigger, the snooze feature should be deactivated due to unreliable wake job execution.

Describe alternatives you've considered

No response

Additional context

No response