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DataStateBehavior does not work within DataGridTemplateColumn.CellTemplate
Talked with Peter via email briefly, but wanted to put this issue here so it doesn't get lost.
Basically, if you provide a DataTemplate to DataGridTemplateColumn.CellTemplate that has visual states and the DataStateBehavior the behavior never successfully goes to either state. The problem is the state names can't be found in the DataGridCell... maybe
because it's inside the ContentPresenter inside the cell's template... ?)