Use dropdown for entity operations (edit/dup/remove)

I see several tests were updated in the merge request built off of #28. Here's a patch that includes my changes in #37 and those test updates.

I'm unsure what tests changed, but I re-ran tests for MR#28 and it also failed the same tests as #39. Something must've changed in this module through another commit to break these tests.

Changing version target for a new MR

dcam → changed the visibility of the branch 3.x to hidden.

dcam → changed the visibility of the branch 2979075-use-dropdown-for to hidden.

I turned #39 into an MR against the 3.x branch. I had to reroll it in the process. I can't help but think that it was all the unrelated blank line additions that caused the problem. Afterward I fixed the newer test failures.

I'm removing the Needs Tests tag. I assume it was necessary at one time because of the addition of the setting. But now it's just a visual change and the existing tests are having to account for the dropdowns. So I think we're good here. If it does need additional testing, then please let me know what specifically you would like to have tested.

I think this is ready at last, and a real improvement.

Reviewed the code and found an issue.
This is a UI change, so needs a ChangeRecord.

I added a change record → , so moving this back to RTBC.

The change record mentions a widget setting. But the latest MR seems to follow #26 and do this automatically without a setting.

Also there's a code fix requested on the MR in #48.