Hi Sean, I don't think I ever committed the change, but I believe I uploaded the GUI patch separately to this ticket: https://sourceforge.net/p/brlcad/patches/540/. Sorry for the late response!
Remove 'extern "C"' keyword from brlcad_miss() and brlcad_hit() function declarations in art/art.h to resolve art compilation on Windows.
Remove unnecessary type-casting from art/brlcadplugin.cpp
Update Appleseed experimental work from GCI 2019
Implement macros to categorize the sedit 'p' command based on how many arguments are required
Sorry - the original patch also includes some changes that are meant for something else (the 'p' command fix). Here's the patch without those changes:
GUI to edit EBM/DSP data source
Great to hear! I'll submit the updated GUI patch as a separate ticket as soon as I can.