Merge PR #299 - leading zero representation

Merge PR #299 - leading zero representation

Adds a movement-wide leading zero 024h representation mode
that's toggleable in the preferences watch face.
Also adds support for the new display mode to existing faces.

I modified the logic a bit to ensure the 24h indicator remains lit
in the simple clock face even when in 024h mode. I also added support
to the more advanced clock face. In the future I will add a compile time
toggle to it as well.

Reviewed-by: Matheus Afonso Martins Moreira <matheus@matheusmoreira.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/299