controllers/flights: Fallback to current date if none found
controllers/flights: Fallback to current date if none found

Show an empty list instead of error 404

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