Just noticed that collapsibles on /test and local master aren't styled correctly anymore. This is a fairly recent regression.
If the theme swatch is set in the markup, the collapsible looks ok (see examples at the bottom of the page. Collapsible sets seem fine too.
Guessing the default swatch or inheritance isn't working quite right.
Reverted commit ea9d1ec. This brings back theme inheritance to collap…
…sibles. Fixes #3780. @wilto - please lemme know if the original commit fixed something that we now need to address another way.