ENH: Some tweaks to scatter plot matrix defaults.
ENH: Some tweaks to scatter plot matrix defaults.

Added a little padding to the ranges, made the marks in the small
scatter plots smaller.

Change-Id: Ib44f4b2accbd0f17366736f38be3d38cbae691ed

ashray/VTK-EVM,cjh1/VTK,cjh1/VTK,johnkit/vtk-dev,demarle/VTK,collects/VTK,collects/VTK,mspark93/VTK,aashish24/VTK-old,sankhesh/VTK,ashray/VTK-EVM,hendradarwin/VTK,jmerkow/VTK,ashray/VTK-EVM,candy7393/VTK,keithroe/vtkoptix,demarle/VTK,sankhesh/VTK,collects/VTK,candy7393/VTK,msmolens/VTK,collects/VTK,keithroe/vtkoptix,hendradarwin/VTK,aashish24/VTK-old,cjh1/VTK,candy7393/VTK,SimVascular/VTK,mspark93/VTK,mspark93/VTK,sankhesh/VTK,mspark93/VTK,jmerkow/VTK,sankhesh/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,sumedhasingla/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,hendradarwin/VTK,sumedhasingla/VTK,ashray/VTK-EVM,mspark93/VTK,candy7393/VTK,msmolens/VTK,biddisco/VTK,sankhesh/VTK,sumedhasingla/VTK,hendradarwin/VTK,ashray/VTK-EVM,aashish24/VTK-old,msmolens/VTK,msmolens/VTK,sumedhasingla/VTK,candy7393/VTK,sumedhasingla/VTK,mspark93/VTK,keithroe/vtkoptix,SimVascular/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,gram526/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,biddisco/VTK,hendradarwin/VTK,johnkit/vtk-dev,biddisco/VTK,SimVascular/VTK,ashray/VTK-EVM,gram526/VTK,jmerkow/VTK,sankhesh/VTK,johnkit/vtk-dev,hendradarwin/VTK,gram526/VTK,biddisco/VTK,jmerkow/VTK,msmolens/VTK,cjh1/VTK,ashray/VTK-EVM,aashish24/VTK-old,hendradarwin/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,demarle/VTK,keithroe/vtkoptix,SimVascular/VTK,jmerkow/VTK,sumedhasingla/VTK,aashish24/VTK-old,SimVascular/VTK,candy7393/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,SimVascular/VTK,jmerkow/VTK,SimVascular/VTK,jmerkow/VTK,demarle/VTK,gram526/VTK,collects/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,collects/VTK,mspark93/VTK,biddisco/VTK,johnkit/vtk-dev,msmolens/VTK,aashish24/VTK-old,biddisco/VTK,gram526/VTK,candy7393/VTK,mspark93/VTK,keithroe/vtkoptix,demarle/VTK,sankhesh/VTK,keithroe/vtkoptix,johnkit/vtk-dev,candy7393/VTK,cjh1/VTK,gram526/VTK,gram526/VTK,demarle/VTK,msmolens/VTK,keithroe/vtkoptix,demarle/VTK,msmolens/VTK,biddisco/VTK,cjh1/VTK,demarle/VTK,gram526/VTK,sankhesh/VTK,sumedhasingla/VTK