[Implemented] Auto !siren- when pulling someone over

[KaraK [T]]

Simple: When you're pulling someone over as a cop, I think there should be an automatic !siren- when the fine screen appears.
As it disappears, there could be a !siren+ again.

Mainly because it is annoying to A) approach a siren screen, slow down, to discover it's only someone who has been pulled over, and B) to keep telling cops to turn their sirens off when pulling someone over.