BUG: Tightly couple the selections to the axes.
BUG: Tightly couple the selections to the axes.

There were problems when scaling the view, so I changed the way that
axis selections are stored in the charts. This approach seems to work
much better.

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