When typing tag, if only one tag remains in list, UI should auto-select it

When typing tags, if there is only one suggestion left, it would be nice if that tag was automatically selected so it can be entered by hitting ENTER.

As it is now, I often accidentally create new tags by hitting ENTER before selecting the existing tag.
For instance, in the screenshot above, I might create a tag “type:spe” when I intended to make “type:spelling”.