Add a distance viewing mode

[insin]

The workout screen is still quite hard to make out from a distance, and could make more use of the full height of the screen. In particular, it's hard to see the current rep.

I don't feel like the total time is really that relevant during a workout - I want to know how long is left of the current rep, is there another rep afterwards, and (am I/can I please be) on the last set?

 Set   Rep 
 111   222
 111   222
 ---------
   Break
 ---------
  000:111
  000:111