tracking.js: simplify updateFlight()
tracking.js: simplify updateFlight()

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