I couldn't find a way to deselect the Edit column (only with Revert to Saved).
What about ESC ?
It's a little bit inconsistent, that if no row in the Edit column is selected and when all rows in the Edit column are selected, both does the the same when as example I click in the toolbar on "Autocorrect Metadata from MusicBrainz"
I found it better in the old version of Jaikoz to select rows on which the toolbar commands act on and not the Edit column. But that's your decision.