Merging a single tag was not allowed before and would throw an error. Now it is allowed, but is a bug because it doesn't make functional sense. There should be a ui error.
Steps to reproduce:
- Add a tag
- Click the dropdown arrow > merge
- Click the merge button and click Ok to the confirmation
- The "merge" is successful with no ui warning
There should be a ui warning that doesn't allow the merge to take place. It used to say "Please choose at least 2 tags."
There is no ui warning and the tag is "successfully merged" into itself.