General cleanup (Code quality, small refactor, D11 compat, gitlab-ci, basic tests)

Let's also fix ✨ Add a dedicated submission to administer the module settings Active here.

Alright all done!

Update hook works as expected!

Great work @grevil, really wonderful cleanup! :)

I left some comments and once finished and we have tests in place, this is ready to go, I think! But we indeed need to be sure this won't break existing functionality.

Great, LGTM!

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