Changeset 12141 for branches/HeuristicLab.DatasetRefactor/sources/HeuristicLab.Problems.DataAnalysis.Views/3.4/ModifiableDatasetView.cs

#2276:

• Implemented a ModifiableDatasetView which allows values in the modifiable dataset to be visually edited.
• Made SetValue and Validate implementations explicit in the Dataset class
• Added explicit implementations of SetValue and Validate in the ModifiableDataset
• Renamed ChangeVariableValue method to SetVariableValue for consistency