add variables for times and group repetitions

[gschenck]

I would like to have variables for times and group repetitions. Then one could choose these values at startup for more flexibility. Now i need a lot of nearly similar tasks.

[DeweyReed]

Hi, thank you for using the app. You can change repetition quickly by tapping the repetition number or double-tapping the group repetition number.

[gschenck]

With this method, I cannot change the value for group repetitions. I have to edit the timer.
If I tap the number of group repetitions twice before starting the timer and change the value from 1 to 5, the value is reset to the default value of 1 during the first run.

[DeweyReed]

The method works when the timer is running. To change the group repetition, double-tap the group number.