Qt: work around Qt5's font choice for Chinese

On Windows there are currently two fonts used.

The first, does the Menu, QTreeView and Tooltips
Second is Everything else which is a default font.

From inspecting QApplication::font() at runtime
Windows 10 English: QFont(MS Shell Dlg 2,8.25,-1,5,50,0,0,0,0,0)
Windows 11 Japanese:        MS UI Gothic,9   ,-1,5,50,0,0,0,0,0
Windows 11 Traditional Chinese: PMingLiU,9   ,-1,5,50,0,0,0,0,0
Windows 11 Simplified Chinese:    SimSun,9   ,-1,5,50,0,0,0,0,0
Windows 11 Korean:                 Gulim,9   ,-1,5,50,0,0,0,0,0

I initially investigated dynamically changing the font when
the UI language is English, but this was getting quite messy

Qt6 makes changes to default font in some situations, so this
PR is being narrowed in scope to only effect Chinese font choices.
This change only effects rendering of Latin/Cyrillic characters.