In addition to the fix (which is simple) we also modify the button handling
of the simulator because, rather by acident, it relies on the bugs in the
battery meter redraw to ensure the simulator stays active.
The ADC on nRF doesn't run precisely stable which means the battery
meter can flicker if updated too often. This will eventually
be fixed by the framework but, for now, let's just force the
update rate to be fairly slow.
At this point both the simulator and a PineTime will come up
and show a clock (although in the case of the PineTime the clock
will just come up at 12:00).
