Tried the font metrics and looks like it works.
One other quick question, I compiled Sigil 2.30 under Windows and had to modify the original command line I used a while back (2.1.0???) since 2.3.0 insisted on finding the Python.exe installed with 2.3.0 as the executable so I had to force the Python install location. Is this expected?
Code:
-DTRY_NEWER_FINDPYTHON3=1
-DPython3_LIBRARIES="%localappdata%\Programs\Python\Python311\libs\"
-DPython3_INCLUDE_DIRS="%localappdata%\Programs\Python\Python311\include"
-DPython3_EXECUTABLE="%localappdata%\Programs\Python\Python311\"
Edit: The reason for compiling Sigil 2.3.0 was to check out the fix for the double popups. I haven't seen one in opening ~20 ePubs so looks good.