Originally reported by @ashley
AFAIK, collapsible tables have been implemented into the MediaWiki core since 1.18 (see https://www.mediawiki.org/wiki/Manual:Collapsible_elements ). Instead of committing a patch to Refreshed's source code, we should just use the jQuery module (since Brickimedia is using mw 1.26), and use the correct class names, which are .mw-collapsible and .mw-collapsed, rather than the current situation which incorrectly uses .collapsible and .collapsed.