Add closed_or_closing_at to closed motion serializer (#3248)
Add closed_or_closing_at to closed motion serializer (#3248)
sicambria/loomio,loomio/loomio,piratas-ar/loomio,sicambria/loomio,piratas-ar/loomio,piratas-ar/loomio,sicambria/loomio,loomio/loomio,loomio/loomio,piratas-ar/loomio,sicambria/loomio,loomio/loomio