Sub sub menu doesn't work properly on desktop resolutions

[romanbondar]

https://forums.athemes.com/t/third-level-menu-not-working/27120

[whimsyniche]

I think I will have to fix this myself by debugging and see what JS is being used for the menu.

Also the submenu goes outside of the viewport if the nav menu is on the edge, so I fixed it by putting right: 0;