GTK doesn't deal well with arbitrarily named font styles

Submitted by Nicholas Miell

Link to original bug (#95043)

Description

Some font faces don't use the usual Regular/Bold/Italic/Bold Italic style naming scheme, either because they provide more weights or obliques than normal, or because they have styles that don't have anything to do with weight or obliqueness.

The font selector doesn't like these for some reason, and behaves in a somewhat random manner -- selecting many of the displayed styles does nothing.

Version: 1.1.x