Simplifies the code by defining dedicated functions
and separating the case from the main ones.
Also use the snprintf function since the buffer size is known.
Simplifies the code and makes it use the correct indicator.
For some reason it had been switched with the alarm indicator.
WATCH_INDICATOR_BELL
The small bell indicating that an alarm is set.
WATCH_INDICATOR_SIGNAL
The hourly signal indicator.
Also useful for indicating that sensors are on.
Deduplicates state in the clock state and movement settings.
Makes the code simpler.
Also makes it use the correct indicator.
For some reason it had been switched
with the hourly chime indicator.
WATCH_INDICATOR_BELL
The small bell indicating that an alarm is set.
WATCH_INDICATOR_SIGNAL
The hourly signal indicator.
Also useful for indicating that sensors are on.
Instances of the clock state structure
are only passed to the clock face itself
and only via the opaque context pointer.
No other code uses it.
Thus there is no need to expose it in a header file.
So make it an implementation detail of the watch face
by localizing it inside the translation unit.
