Updates Needed to Build ParaView Master

[psavery]

We were able to build paraview master with tomviz until about a week ago. This MR broke a few lines of code for us, since vtkSMGlobalPropertiesProxy, which is used here, no longer exists.

To fix it, it looks like it will just be a few changes to the code, changing vtkSMGlobalPropertiesProxy to vtkSMSettingsProxy, and changing a few function calls also. We can follow their example in their MR.

We will do this when we want to move our paraview fork forward.