WIP: Fix B2CharmlessInclusive line
The line was using a single SimpleSelection object for the decays rho->pipi, rho->pipipi0 and rho->pipigamma. This caused the line to select rho->pipi candidates only is at least a gamma and pi0 candidates was present in the event. This is now fixed using 3 independent SimpleSelection and merging the output.
Still to be tested to check the rates.