Can we use the animated +/- icon(s) used under Market-driven curriculum here: https://business.edx.org/products/microbootcamps for expand/collapse widgets more generally (to disambiguate vs. the down-pointing-carret used for <select>-type listboxes)?
Notes:
[Adam] Collapsible used to have +/- icons.
It was changed to use the current up/down carets in September 2021 (JIRA ticket & PR). I don’t have context into why this design decision was made.