Created during a breakdown session (more notes in T251102#6307821)
BDDs and design from T251102
Tech Notes
An example cookie that can be copied / looked at in wikibase code is wikidatawikiwikibase.acknowledgedcopyrightversion for the dismissing of the cc0 edit warning.
This same popup also saves this setting as a user preference when displayed to logged in users
We can likely find lots of the things we need by looking at that code.
https://codesearch.wmcloud.org/search/?q=acknowledgedcopyrightversion&i=nope&files=&repos=
https://gerrit.wikimedia.org/g/mediawiki/extensions/Wikibase/+/9b837c08f6ab1d05bf7e4f838737ad425b75b19a/repo/resources/wikibase.ui.entityViewInit.js