Show count of selectables

[marcusgreen]

See this forum post for description
https://moodle.org/mod/forum/discuss.php?d=404036#p1639448
My idea for implementation.
A checkbox that says something like 'Show count of selectables'
Then show a count of how many items can be selected (are surrounded by braces) as a student attempts the question.
Then as a nice to have.
Have some javascript that decrements/increments a count as the student selects items.
No timeframe/promises on this one.