Add theory systematic uncertainty global variables to correctly factor out inclusive effects in final fits
When calculating impact from LHEScaleWeight/LHEPdfWeight variations we must factor out the variation in the inclusive cross section.
This should be done over all events (before any selection).
As final fits only sees the events which enter the analysis then we need to include the information somewhere.
It looks like nanoAOD has some already defined useful variables for this: see Runs content