BUG: Mark the scene as dirty when necessary.
BUG: Mark the scene as dirty when necessary.

Thanks to Eric E. Monson for the suggestion on the VTK mailing list.

keithroe/vtkoptix,candy7393/VTK,berendkleinhaneveld/VTK,demarle/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,hendradarwin/VTK,mspark93/VTK,jeffbaumes/jeffbaumes-vtk,sankhesh/VTK,gram526/VTK,daviddoria/PointGraphsPhase1,biddisco/VTK,aashish24/VTK-old,keithroe/vtkoptix,johnkit/vtk-dev,daviddoria/PointGraphsPhase1,SimVascular/VTK,daviddoria/PointGraphsPhase1,biddisco/VTK,cjh1/VTK,jeffbaumes/jeffbaumes-vtk,keithroe/vtkoptix,aashish24/VTK-old,ashray/VTK-EVM,ashray/VTK-EVM,biddisco/VTK,candy7393/VTK,ashray/VTK-EVM,arnaudgelas/VTK,gram526/VTK,sumedhasingla/VTK,collects/VTK,ashray/VTK-EVM,Wuteyan/VTK,sankhesh/VTK,sumedhasingla/VTK,msmolens/VTK,demarle/VTK,biddisco/VTK,cjh1/VTK,msmolens/VTK,naucoin/VTKSlicerWidgets,SimVascular/VTK,SimVascular/VTK,mspark93/VTK,candy7393/VTK,collects/VTK,sankhesh/VTK,msmolens/VTK,johnkit/vtk-dev,daviddoria/PointGraphsPhase1,jmerkow/VTK,biddisco/VTK,SimVascular/VTK,gram526/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,msmolens/VTK,sankhesh/VTK,msmolens/VTK,cjh1/VTK,arnaudgelas/VTK,naucoin/VTKSlicerWidgets,collects/VTK,candy7393/VTK,sankhesh/VTK,collects/VTK,mspark93/VTK,naucoin/VTKSlicerWidgets,spthaolt/VTK,johnkit/vtk-dev,arnaudgelas/VTK,keithroe/vtkoptix,hendradarwin/VTK,gram526/VTK,naucoin/VTKSlicerWidgets,SimVascular/VTK,demarle/VTK,spthaolt/VTK,sumedhasingla/VTK,jmerkow/VTK,SimVascular/VTK,msmolens/VTK,keithroe/vtkoptix,SimVascular/VTK,spthaolt/VTK,aashish24/VTK-old,berendkleinhaneveld/VTK,hendradarwin/VTK,naucoin/VTKSlicerWidgets,spthaolt/VTK,jmerkow/VTK,spthaolt/VTK,berendkleinhaneveld/VTK,Wuteyan/VTK,mspark93/VTK,collects/VTK,SimVascular/VTK,Wuteyan/VTK,keithroe/vtkoptix,ashray/VTK-EVM,jeffbaumes/jeffbaumes-vtk,gram526/VTK,aashish24/VTK-old,johnkit/vtk-dev,demarle/VTK,sankhesh/VTK,sumedhasingla/VTK,mspark93/VTK,candy7393/VTK,sankhesh/VTK,jeffbaumes/jeffbaumes-vtk,jmerkow/VTK,sumedhasingla/VTK,daviddoria/PointGraphsPhase1,biddisco/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,Wuteyan/VTK,jmerkow/VTK,arnaudgelas/VTK,jeffbaumes/jeffbaumes-vtk,msmolens/VTK,Wuteyan/VTK,jmerkow/VTK,johnkit/vtk-dev,gram526/VTK,mspark93/VTK,hendradarwin/VTK,keithroe/vtkoptix,demarle/VTK,demarle/VTK,cjh1/VTK,candy7393/VTK,sumedhasingla/VTK,demarle/VTK,ashray/VTK-EVM,gram526/VTK,hendradarwin/VTK,candy7393/VTK,ashray/VTK-EVM,sumedhasingla/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,johnkit/vtk-dev,aashish24/VTK-old,demarle/VTK,mspark93/VTK,msmolens/VTK,collects/VTK,johnkit/vtk-dev,hendradarwin/VTK,berendkleinhaneveld/VTK,Wuteyan/VTK,arnaudgelas/VTK,sankhesh/VTK,spthaolt/VTK,aashish24/VTK-old,spthaolt/VTK,keithroe/vtkoptix,gram526/VTK,biddisco/VTK,arnaudgelas/VTK,cjh1/VTK,sumedhasingla/VTK,Wuteyan/VTK,daviddoria/PointGraphsPhase1,cjh1/VTK,hendradarwin/VTK,mspark93/VTK