GPS Recorder - track filename ? and potential issue

I'm not sure a global power option is a good idea - surely if a watch face needs GPS it should just call Bangle.setGPSPower(1) to turn it on? There's no problem calling Bangle.setGPSPower(1) twice.

For now, if you need to check for GPS, how about something like:

var hasGPSData = false;
Bangle.on('GPS',fix => {
  hasGPSData = true;
  // ...
});
setTimeout(function() {
  // if no GPS data in 2 seconds, turn it on
  if (!hasGPSData) Bangle.setGPSPower(1); 
}, 2000);