Lack of shortcut for secondary menu
Some apps like GNOME Disks use F10 to open the secondary menu, while other apps like Calendar use F8. It would be nice to set a standard shortcut for this menu, so it can be consistently used by core and third-party apps.
HIG states that F10 can be used for opening both menus, but a lack of a specific shortcut for the secondary menu lead to inconsistent behavior as described above.
Edited by Automeris naranja