Add automated tests

I have a test drafted but still need to type it and work out bugs; assigning to myself.

Have a test of basic functionality in place.

Updated the list of remaining tasks to include other tests we need.

Lets move this to "Needs work"

Added a test of the list functionality.

Added Create/Read/Update/Delete tests.

Merged the Message Listing test into the CRUD message tests; it kinda makes more sense there.

Added Create/Read/Update/Delete Message-Type tests.

The CRUD message-type tests briefly broke because of 🐛 Feedback message type entity doesn't declare its success_message property Active , but after merging that, they are working again.

I think it might be worth splitting the remaining tests into separate issues, and merging this one, so I'm going to do that.

Created ✨ Add database updates test Active and ✨ Add tests for views component Active

Merging.

Marking as fixed.

Added ✨ Add tests for block plugin Active as well.