Stats don't update immediately on screen on event

[ViGouRCanberra]

Since the stats only update on a 2 second interval when the display is on, the stats can sometimes be incorrect for a second or two max after screen on events. If you just want to glance at your step count, that can be irritating.

This needs to update immediately on screen on event, rather than relying on the interval function that updates every 2 seconds while the screen is on.

[ViGouRCanberra]

Added function to update steps in the screen on event so that the steps are updated on screen on