Proposal for tidying up Settings App

Bangle would then always go back to the menu or the main screen instead of activating a setting or an app

Yes, I think that's another good reason. I'm very happy to change 'Back' to be at the top.

Just a note on this though: If you turn Wave on BTN2 off in LCD settings, in order to get in this state you have to have pressed a button other than BTN2 first, which makes accidentally entering the launcher a lot less likely :)