Since there may be some applications that want to make their comboboxes
scrollable or not with the mouse wheel then a style hint is added to
make this toggable. It defaults to true for all platforms except macOS
to keep it in line with existing behavior.
[ChangeLog][QtWidgets][QStyle] Added SH_ComboBox_AllowWheelScrolling as
a style hint to enable/disable the use of the mouse wheel in a QComboBox.
This defaults to true in all styles except the macOS one so there is no
change in existing behavior.
Task-number: QTBUG-53094
Change-Id: I6eb61e1990bfc79e3b3ea82d7b91ee39096fa077
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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