TQDefaultPlotter should auto-skip subplots for multi-dim histograms
Currently the TQDefaultPlotter can lead to warnings and eventually crashes when trying to produce 2D plots (i.e. from TH2s) when a subplot style/type is specified in the master config. One may want to produce normal stacked plots together with some 2D plot (plus it's a really confusing crash for users...).
-> Set subplot type to None for TH2s (and TH3s)!