Consistently spell modeler with one "l"

Can cspell help with this? I think it complains about e-mail with a hyphen; maybe we can get it to complain about modeller.

Probably we should do the two steps in the reverse order of what I wrote in the issue summary. Then the pipelines will show that the static analysis does what we want and that we have caught all instances.

I've done all of that as part of 📌 Optimize plugin managers Active already, and the spell check of the CI with catch future errors automatically for us.

There is one remaining class that will be covered by 📌 Finalize the ListBuilder class to be generic Active where we still have old spelling. As everything else is completed, I mark this one as fixed.

Automatically closed - issue fixed for 2 weeks with no activity.