ChartHistogram2D does not appear to handle 'r' key press event
vtkChartHistogram2D does not appear to reset when the 'r' key is pressed.
At VTK 5.10.1, in vtkContextScene::KeyPressEvent(), newItemPicked is a vtkChartHistogram2D and vtkChartXY::KeyPressEvent() is called which handles the 'r' key press.
At VTK 9.1.0, in vtkContextScene::KeyPressEvent(), newItemPicked is a vtkPlotHistogram2D which has empty key press handlers.
I have tried left mouse clicks before pressing the 'r' key at a variety of positions in the scene but this has no effect.