WIP: DUTAssociation -> historam hNoAssocCls should have entries = number of tracks
I started this merge request because I realized that the number of entries of the histgram DUTAssociation/hNoAssocCls which shows the distribution of clusters per track has a smaller number of entries as the total number of tracks.
I realized that this is (partially) due to the fact that the histogram is not filled (with 0) when no clusters are present on the clipboard.
No I still get a slightly smaller number as the number of tracks...maybe Katharina, can you have a look at this? I think you introduced this plot, right? - you can push to this branch :-)