Hiding the back widget

[sonicityV]

For a while since getting the bangle, I've been wanting ways to maximize available screen area since the screen is already pretty small.

This lead me to wonder if the back widget could be added as an app or an option so it can be hidden/removed. It feels like a vestigial organ since while was needed in earlier versions of the bangle flavour of the Espurino software, it is no longer needed on the BangleJS 2 at the very least. Most apps have been ported to where a user can press the side button or click the title of the page [ the ☰ icon] to go back.