js/slFlight: Extract "coordinate" property
js/slFlight: Extract "coordinate" property

skylines-project/skylines,Turbo87/skylines,shadowoneau/skylines,Harry-R/skylines,Turbo87/skylines,Turbo87/skylines,kerel-fs/skylines,Harry-R/skylines,RBE-Avionik/skylines,shadowoneau/skylines,skylines-project/skylines,RBE-Avionik/skylines,skylines-project/skylines,RBE-Avionik/skylines,kerel-fs/skylines,skylines-project/skylines,shadowoneau/skylines,Harry-R/skylines,Harry-R/skylines,Turbo87/skylines,shadowoneau/skylines,kerel-fs/skylines,RBE-Avionik/skylines