Reset the camera's view angle in vtkRenderer::ResetCamera.
Reset the camera's view angle in vtkRenderer::ResetCamera.

Otherwise zooming and resetting the camera repeatedly will cause the
view angle to approach 0, eventually leading to odd z-buffer artifacts.

Change-Id: Icbb486d94c44f3761f0e9afdff1695deeea0b1b9

demarle/VTK,jmerkow/VTK,gram526/VTK,keithroe/vtkoptix,jmerkow/VTK,candy7393/VTK,mspark93/VTK,SimVascular/VTK,mspark93/VTK,demarle/VTK,SimVascular/VTK,sumedhasingla/VTK,hendradarwin/VTK,candy7393/VTK,jmerkow/VTK,keithroe/vtkoptix,demarle/VTK,SimVascular/VTK,msmolens/VTK,SimVascular/VTK,ashray/VTK-EVM,ashray/VTK-EVM,berendkleinhaneveld/VTK,SimVascular/VTK,ashray/VTK-EVM,gram526/VTK,mspark93/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,keithroe/vtkoptix,biddisco/VTK,jmerkow/VTK,sankhesh/VTK,johnkit/vtk-dev,ashray/VTK-EVM,hendradarwin/VTK,biddisco/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,msmolens/VTK,gram526/VTK,demarle/VTK,sumedhasingla/VTK,candy7393/VTK,gram526/VTK,sumedhasingla/VTK,gram526/VTK,berendkleinhaneveld/VTK,candy7393/VTK,sumedhasingla/VTK,johnkit/vtk-dev,keithroe/vtkoptix,ashray/VTK-EVM,gram526/VTK,keithroe/vtkoptix,johnkit/vtk-dev,gram526/VTK,mspark93/VTK,demarle/VTK,msmolens/VTK,sumedhasingla/VTK,msmolens/VTK,hendradarwin/VTK,johnkit/vtk-dev,SimVascular/VTK,biddisco/VTK,jmerkow/VTK,msmolens/VTK,ashray/VTK-EVM,sankhesh/VTK,hendradarwin/VTK,candy7393/VTK,jmerkow/VTK,sankhesh/VTK,candy7393/VTK,johnkit/vtk-dev,hendradarwin/VTK,keithroe/vtkoptix,hendradarwin/VTK,mspark93/VTK,keithroe/vtkoptix,candy7393/VTK,sumedhasingla/VTK,demarle/VTK,mspark93/VTK,biddisco/VTK,biddisco/VTK,msmolens/VTK,msmolens/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,demarle/VTK,sankhesh/VTK,SimVascular/VTK,msmolens/VTK,sankhesh/VTK,biddisco/VTK,biddisco/VTK,demarle/VTK,candy7393/VTK,SimVascular/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,sankhesh/VTK,sankhesh/VTK,johnkit/vtk-dev,sankhesh/VTK,johnkit/vtk-dev,jmerkow/VTK,ashray/VTK-EVM,mspark93/VTK,berendkleinhaneveld/VTK,mspark93/VTK,gram526/VTK