With Qt 5.2, native menubar do not display properly on Linux due to a bug in Qt.
I think it's worth fixing as I didn't realize it until (except by finding the
application quite limited) until I tested on another computer. Other user may
meet the same issue.
As 5.2 is quite old (but still in use in stable), I don't bother checking
whether it's Linux or Windows and just switch to the non-native menu bar if
version is older than 5.3.
With Qt 5.2, native menubar do not display properly on Linux due to a bug in Qt. I think it's worth fixing as I didn't realize it until (except by finding the application quite limited) until I tested on another computer. Other user may meet the same issue.
As 5.2 is quite old (but still in use in stable), I don't bother checking whether it's Linux or Windows and just switch to the non-native menu bar if version is older than 5.3.
https://forum.qt.io/topic/7276/menu-not-showing-up-in-menubar/9