js/slUnits: Add getDistanceUnit() methods
js/slUnits: Add getDistanceUnit() methods

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