We need a Qt check similar to:
https://github.com/Sigil-Ebook/Sigil.../main.cpp#L488
in PageEdit's main at
https://github.com/Sigil-Ebook/PageE.../main.cpp#L299
My bad.
Just comment out line 299 in PageEdit's main.cpp if you want to test before I get around to testing and pushing.