Completely refactors the simple clock face and lays the foundations for new features. Also adds a compile time 24 hour mode only feature. Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com> Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com> Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com> GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/373