No worries dude, glad it helped get you there in the end. I’m using 4.18 btw, so not sure if that impacts this.
Anyway, why not share your final version and tweaks, to help others out who may arrive to the thread later? 
In general, a big part to Menus / User-Interface work etc is how exactly players end up choosing to actually hit the buttons…
And which buttons you assign. I use left/right thumbstick buttons as they’re less likely to be triggered accidentally in game.
But of course using Left / Right Trigger etc, might bring a completely different result, so its good the more devs that share.
(The 1st version is similar to Windows Desktop navigation & back again, hitting ‘Windows-Key’ first then pressing ‘D’ etc).