On Mac, we use QComboMenuDelegate specifically as
item delegate for the popup list. It happens that
the order of resolving the font for each item
individually would prioritize QComboBox's font
instead of whatever the assigned model's FontRole
would specify.
The fix only requires checking whether FontRole is
valid before falling back QComboBox's properties.
Change-Id: I7208ad1911b30cc52c826c1884a1e19f5acd9fb4
Task-number: QTBUG-56693
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>