New Bangle.js 2 menu system

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Gordon
@myownself I don't think that's a good idea I'm afraid - if you imagine something like the Settings app, it means that it'd have to have every menu loaded into RAM at once. We really need the functions. We could have "Submenu" : { submenu: function() { ... } }, though I guess.

Or, maybe we just detect > on the end of the string, a bit like:
```
var mainmenu = {
  "" : { "title" : "Main Menu" },
  "< Back" : function() { print("Back") },
  "Submenu >" : function() { E.showMenu(submenu); },
};
```
Then it's kind of obvious from the code what it's going to look like anyway.

@malaire thanks - looks like something got broken as it worked in earlier firmwares. I've just fixed it now.

Not sure what you mean by:

Also pressing button does nothing in that menu, i.e. it doesn't go back to previous menu.

though

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malaire in reply to @Gordon
Not sure what you mean by:
Also pressing button does nothing in that menu, i.e. it doesn't go back to previous menu.

though
I meant that if I go to Settings > Bluetooth > HID and then decide that I don't want to change it after all then I can't get back by pressing the button, I need to re-select the option that is currently selected to get back.

But actually I'm not sure if button is even intended to work there.

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