I was mistakenly thinking that you can define variables in beforeEach, but it turns out these are not used.
Rather, Jest was automatically creating variables for the elements according to their IDs. How convenient!
This introduces a new 'toggle' controller, and we already had three\! So I created a generic interface that could be extended to potentially support all of them. I propose we try to reduce them all into the one controller, but won't go down the rabbit-hole just yet..
I have an idea on how to re-arrange and make it more contained, by assigning the controller only to the checkbox, and defining targets with aria-controls="", but chose to stick with Stimulus conventions for now.
