Make SingleExposurePilatus stop acquisition at the beginning of
prepareForCollection.
Create NXPlugin to start (if no scan is running) and stop free run
acquisition
Merge remote-tracking branch 'i07-prod/8.30' into 8.30
Merge remote-tracking branch 'origin/8.30'
GDA-5623 Add an atLevelStart hook to Scannable [More missed classes]