Draft: Add option for electron persistency for bandq selective persistence lines
Added options to persist electrons (both with and without bremsstralung corrections) to B&Q selective persistence lines. Expect small increase in sprucing BW compared to current implementation of selective persistency (Around ~5%). By default, store:
- Long electrons w/bremsstrahlung correction from same PV as candidate
- Detached (OWNPVIPCHI2 > 6) long electrons w/bremsstrahlung correction
- All downstream electrons w/bremsstrahlung correction