SusySelection: refactor count/increment also for the counters before sameSignOrQflip

Details:
same thing done for the other counters, but now for the counters that were before qflip.
This causes a change in the yields:

< category         :    528.564   774.229   578.269         0   578.269
< nSigLep          :    528.564   740.229   562.133         0   562.133
> category         :    132.673   774.229   281.846         0   281.846
> nSigLep          :    132.673   740.229   274.872         0   274.872

< ge1j             :    53.0916   65.3436   96.7717         0   96.7717
> ge1j             :    53.0912   65.3436   96.7716         0   96.7716

For mm nothing changes. For ee/em, there are two changes:

1. the counters after qflip have small changes due to the events that
   passed/failed with the unsmeared electron.
2. the counters before qflip were filled N times (N= N syst) and now
   they're filled only once (running with 2 syst, -> ~1/3)