VTK - set at_begin to true for all debounced key events (just a minor-minor improvement of the feel of responsiveness)
VTK - set at_begin to true for all debounced key events (just a minor-minor improvement of the feel of responsiveness)

vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk