Widgets/clock removal when opening a new app

[gfwilliams]

Posted at 2019-12-12 by @gfwilliams

I thought I'd see if anyone else had some thoughts about this... Basically how we handle loading new apps, since right now the clock and widgets are loaded, then when the menu loads we do our best to remove them from memory, but it's a bit hacky.

espruino/BangleApps#65

Please can we discuss on the GitHub issue above though?