Improve navigation in gym mode

[rolandgeider]

Just a few more suggestions, when I open the burger menu on the top right show an overview of the progress. Currently I have to remember which exercise I have to reorder because someone was using the machine and I have to come back to it.

So the idea would be: keep the list style, but mark as green if done and the overview amount of sets. E.g.:

• Squats -- 0/3
• Leg curl -- 2/3

When I'm doing the exercise I have no overview on how many sets are left, if it is a 3,4 or 5 sets exercise.

Also, in the exercise summary would be nice to have an overview of the planned, a simple list with the sets:

• set 1: 10 reps
• set 2: 12 reps
• set 3: 8 reps

Originally posted by @eHonnef in #364 (comment)