New Tag generated during Tag Edition

1. Click over the Tags Editor
2. Type any tag name and hit **return**
3. Double click over the new tag bubble
4. Press any key

As a result, a new tag will be immediately created without confirmation.

h/t @eshurakov for spotting this one!

Start in the macOS Tags Editor and reproduce the sequence: create a tag, double-click its bubble, then press a key. Trace the tag-bubble editing entry point and verify that typing while editing does not immediately create another tag without confirmation.

Written by the indexing model from the issue text.