Parity row "close in favour of another" (krz/gitbay!413).
close(inFavourOf:)appends--by <m>tomr close.- The close dialog gains "Close in favour of another…", which opens a sheet of the repository's other open merge requests (
mr list --state open, this one excluded) and confirms the pick. MRDetail.supersededBydecodessuperseded_by; the stamp reads "closed in favour of !N by …" and a row links to !N.