don't reset camera clipping range when there are no visible 3D props
don't reset camera clipping range when there are no visible 3D props

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