More info in yellow badge in card
This is a follow up to the TODO items in the readme.
When the badge is yellow (both half green or half red, see MR in issue #2 (closed)) it should display a number and an arrow:
- the number is the length of the step.more_successful_attempts fields, a large number means that a lot of backtracking took place
- the arrow should be a link to the first entry in more_successful_attempts (it is a list of step_id for the current runtime).
Example: if a card (rid|sid)
has more_successful_attempts = [ 7, 16, 21 ]
then it should display a 3
next-to/inside the color badge and also a <a "(rid|7)">→</a>
to jump to the next attempt (rid is the same).