BUG: Visibility was ignored for images in vtkImageStack.
BUG: Visibility was ignored for images in vtkImageStack.

The visibility flag of members of the vtkImageStack was ignored.
If a stack had only one member and if the vtkImageStack had a
non-identity matrix, then the member's matrix was not reset
correctly after the initial poke.

Change-Id: If7246d5cc8cff3cc8bd3ad2cb143ba78141f173c

sumedhasingla/VTK,candy7393/VTK,johnkit/vtk-dev,aashish24/VTK-old,johnkit/vtk-dev,gram526/VTK,demarle/VTK,demarle/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,hendradarwin/VTK,biddisco/VTK,jmerkow/VTK,collects/VTK,sankhesh/VTK,collects/VTK,sankhesh/VTK,sumedhasingla/VTK,mspark93/VTK,berendkleinhaneveld/VTK,gram526/VTK,msmolens/VTK,aashish24/VTK-old,hendradarwin/VTK,johnkit/vtk-dev,candy7393/VTK,hendradarwin/VTK,msmolens/VTK,jmerkow/VTK,ashray/VTK-EVM,mspark93/VTK,collects/VTK,msmolens/VTK,sumedhasingla/VTK,demarle/VTK,keithroe/vtkoptix,sankhesh/VTK,johnkit/vtk-dev,hendradarwin/VTK,mspark93/VTK,biddisco/VTK,gram526/VTK,ashray/VTK-EVM,keithroe/vtkoptix,aashish24/VTK-old,sankhesh/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,mspark93/VTK,SimVascular/VTK,demarle/VTK,biddisco/VTK,msmolens/VTK,sumedhasingla/VTK,candy7393/VTK,SimVascular/VTK,SimVascular/VTK,gram526/VTK,jmerkow/VTK,demarle/VTK,jmerkow/VTK,gram526/VTK,johnkit/vtk-dev,collects/VTK,candy7393/VTK,candy7393/VTK,sumedhasingla/VTK,mspark93/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,jmerkow/VTK,keithroe/vtkoptix,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,hendradarwin/VTK,candy7393/VTK,msmolens/VTK,jmerkow/VTK,biddisco/VTK,sumedhasingla/VTK,SimVascular/VTK,mspark93/VTK,ashray/VTK-EVM,johnkit/vtk-dev,biddisco/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,SimVascular/VTK,gram526/VTK,berendkleinhaneveld/VTK,biddisco/VTK,demarle/VTK,mspark93/VTK,mspark93/VTK,msmolens/VTK,hendradarwin/VTK,ashray/VTK-EVM,collects/VTK,demarle/VTK,biddisco/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,msmolens/VTK,SimVascular/VTK,keithroe/vtkoptix,sumedhasingla/VTK,SimVascular/VTK,ashray/VTK-EVM,sankhesh/VTK,gram526/VTK,candy7393/VTK,collects/VTK,SimVascular/VTK,jmerkow/VTK,ashray/VTK-EVM,aashish24/VTK-old,msmolens/VTK,ashray/VTK-EVM,candy7393/VTK,aashish24/VTK-old,sankhesh/VTK,keithroe/vtkoptix,hendradarwin/VTK,keithroe/vtkoptix,demarle/VTK,gram526/VTK