I’ve seen discussions for this capability dating back to 2013.
That’s 3 years… and still nothing ?
ie: (Menu 2-2-1, -2, -3 is what I am referring to)
Menu Option 1
Menu Option 2
-> Menu 2-1
-> Menu 2-2
----> Menu 2-2-1
----> Menu 2-2-2
----> Menu 2-2-3
-> Menu 2-3
-> Menu 2-4
Menu Option 3
Menu Option 4