Shuffle card deck

[pabloAMaldonado]

Is your feature request related to a problem? Please describe.
No problem, maybe just a missing user story.

Describe the solution you'd like
What happens when the user completes the 3 tests and then starts a new one (whether they change the number of repeats or not)? Should the timers for the other two tests reset, and will there be another warning?

Describe alternatives you've considered
I think that if the user does not change the number of repeats, the timers should be kept; otherwise, they should be reset.