I have been asking about something like this as well.
Not sure my request is the same as the OP, however, I see the need for at least 2 options related to Service Types.
A Service Type (Wild Card/Always Monitor) that will never be filtered or turned off, only way to avoid something programmed this way would be to Lock Out the channel or turn off the option with Quick Keys.
The other option would a simple toggle based "All Service Types". This feature would allow an operator to easily toggle between the configured Service Types and quickly enabling all Service Types.
This feature would be very helpful instead of going though each Service Type, enabling each one, then remembering which Service Types to turn off.
Example of when this may be useful, later at night or during low activity periods, being able to easily toggle all Service Types on to easily monitor all traffic, then an easy toggle back to the previous Service Type settings.
With approximately 30 Service Types to individually change many of these Service Types, and keep track of them, is not so quick or easy.
Remember, I see Service Types as "filters" to limit monitoring based upon the setting.