If you moved away and back to these faces, you'd lose the indicator. Not that the indicator here
seems very valuable, since it's not displayed on simple_clock_face, but at least
this makes things more consistent.
* Make countdown face reset to 0
It was annoying to have countdowns less than DEFAULT_MINUTES.
Admittedly, this does make DEFAULT_MINUTES fairly useless, since
we only ever see it the first time...
* Undo accidental change to movement_config.h
