Improve experimental theme/module installation warning

kazuko.murata → made their first commit to this issue’s fork.

I've created MR !12710. Instead of the format listed, I believed it should be an Oxford comma, though this wouldn't be difficult to replace if not. Please could someone review.

I'm moving this back to needs work. I'm currently struggling to get tests working locally, so if someone would like to take this on, feel free.

I was able to get tests working locally and have fixed the issue and the pipeline now passes. Happy to move this back to NR. Please review MR !12710

arisha → changed the visibility of the branch 3086941- to hidden.

@arisha, can you clarify what you changed about your approach and why it might be preferred approach?