MenuView scrolling vertically #355

Expected behavior
MenuView can't be scrolled vertically
https://ibb.co/bwv7OF

Actual behavior
MenuView can be scrolled vertically
https://ibb.co/h2jCqv

How to reproduce
Setting the displayMode's scrollingMode as .scrollEnabled or .scrollEnabledAndBounces
I'm using the .standard displayMode

My questions are:

1. is it the expected behavior?
2. if so, how to disable vertical scrolling in MenuView?

Thanks a lot :)
@kitasuke