2D text size different in pvbatch and gui

Steps:

• Start paraview with -dr i.e paraview -dr
• File > Load State and load this script: foo.py (feel free to edit script to change where the image is saved.
• This will generate a /tmp/image.png as follows:

• Now edit the script to change the filename and run under pvbatch as follows:

> pvbatch -dr foo.py

This generates an image as follows:

Notice how the text sizes are different. This is incorrect.