- it looks like D17 has slit normalisation on while figaro has it off -> new AUTO option for automatic switch in SumForeground
- BGS3 values will be corrected now in common since needed for ReflectometryBeamStatistics and ReflectometryILLConvertToQ
- the updated slit widths are used for all computations (also slit normalisation)
- however, only the slit sizes of the reflected beams seem to be updated.
-> this information is gathered from Cosmos code but it may be a difference where the slit updated widths will be applied.

Refs #24555