When pasting a BBID or bookbrainz URL in the relationship editor entity search, the entity is found in search results but the user then needs to select it.
We should automatically select a result found when pasting a BBID or bookbrainz URL.

This will consolidate the behaviour with MusicBrainz': here a paste of url or id will auto-select the entity (and also change any selected type to the correct one)

Doing this also in bb will be a great QOL improvement and timesaver.

it should also be fairly uncontroversial given that any BBID is unique.