Alright, @mherchel, I'm convinced we should use local storage. Now let's talk about implementation. We would need to delegate responsibility of ensuring the checkbox is checked to javascript (as Gin does: https://git.drupalcode.org/project/gin/-/blob/8.x-3.x/js/sidebar.js)
This might cause trouble for the work I've done to handle loading the off-canvas dialog in same_page_preview.module.
Let's study this...
While studying this we found the implementation of localStorage to be quick and easy. This leads us to question what else we could tuck into localStorage. A couple quick ideas of settings we could store
Closed: outdated
1.0
Code
in 📌 On by default, make off-by-default an opt-in setting Closed: duplicate I've got localstorage working. I might mark this issue as a duplicate of that.
Marking as closed - we've made substantial use of local storage in 2.x