New Bangle.js 2 menu system

@Alessandro thanks - I'll get a fix in for that.

I have spotted that adding a new Yes/No item no longer works as it stays as No when I go back into settings after just setting it to Yes. So I have changed my code to remove the format.

Can you give me a really small code example that shows the issue? This sounds like something in the new menu system that needs fixing maybe?

This is an example of why I don't want per-version numbering at the moment :) the menu system is very much in development right now. I don't want people making hacks in their code just because of an issue that existed in the cutting edge firmware for a few days :)

re: the back button and title. I feel that's very much personal preference. Before the next full release I'll be trying to add some kind of configurable 'back' functionality.