Creates a GtkPopoverMenu and populates it according to @model.
The created buttons are connected to actions found in the
action groups that are accessible from the parent widget.
This includes the GtkApplicationWindow to which the popover
belongs. Actions can also be added using [method@Gtk.Widget.insert_action_group]
on the parent widget or on any of its parent widgets.
The only flag that is supported currently is
%GTK_POPOVER_MENU_NESTED, which makes GTK create traditional,
nested submenus instead of the default sliding submenus.
Creates a GtkPopoverMenu and populates it according to @model.
The created buttons are connected to actions found in the action groups that are accessible from the parent widget. This includes the GtkApplicationWindow to which the popover belongs. Actions can also be added using [method@Gtk.Widget.insert_action_group] on the parent widget or on any of its parent widgets.
The only flag that is supported currently is %GTK_POPOVER_MENU_NESTED, which makes GTK create traditional, nested submenus instead of the default sliding submenus.