Volume Rendering not working on 2013 Mac with ParaView 5.8.0 and up

@utkarsh.ayachit @cory.quammen @patchett2002

I am not able to volume render with the 5.8.0 release binary. MacOS 10.14.6. Labelling as important for now. If I'm the only one encountering this problem, it may not be as important.

Steps to recreate:

Open disk_out_ref.ex2, All variables on, Apply
Color by Pres, choose volume representation

I get this black renderview:

On a master build following the same steps I get this error:

(  40.880s) [paraview        ]vtkOpenGLProjectedTetra:522    ERR| vtkOpenGLProjectedTetrahedraMapper (0x7fd5ca82ca00): failed at glBlitFramebuffer 1 OpenGL errors detected
  0 : (1282) Invalid operation

Edited Apr 16, 2020 by Ethan Stam

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