docs: bloatpad.c's GMenu uses submenu-action without explanation
@murrayc
Submitted by Murray Cumming Link to original bug (#708152)
Description
bloat_pad_startup() uses a submenu-action attribute in its time-menu submenu: https://git.gnome.org/browse/gtk+/tree/examples/bloatpad.c#n394
I cannot find any explanation for this in GMenu, GAction, or GtkBuilder's documentation. I guess it should be documented and that a comment in bloatpad.c could give a hint about why it is there.