Changeset 8578 for trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/FeatureCorrelation

#1292:

• added ProblemDataView which has a button to open the feature correlation
• added abstract base class for feature correlations
• added caches for the feature correlation
• created own class for calculation of feature correlation
• changed SelectedItemChanged to SelectionChangeCommitted events, so the correlation is only calculated if the user changes the selection