Bangle.js 2 speedups

The not yet fast load compatible clocks could be changed to loading widgets and then directly hiding them using widget_utils without ever drawing.

Yes... Personally now 2v16 has overlays that can go offscreen I'd like to see as many watches as possible load the widgets and then put them offscreen so a downwards swipe would show them.

I'll see about extending widget_utils to make that possible + easy