Consider adding an example of Popup Menu

[0x414a]

Consider adding an example of Popup Menu, which is easy in GTK3 but not in GTK4, which has bothered me for a long time because I am not familiar with GTK4,thank you

[diamondburned]

You can see how gtkutil does it, as a reference.

[0x414a]

I'll give it a try,thank