V6 scansat.cs fixes

The event and action group fixes are minor. 

The powerIsProblem bool can cause onUpdate to continue looping through, which prevents the scanner from deactivating properly. 

Explicitly setting powerIsProblem = false with the stop scan button (which also works through the toggle scan action group) should fix this. Including it in onInitialize should prevent any carrry over from bugged scanners on old versions.