js/map: Simplified base layer setting from cookie
js/map: Simplified base layer setting from cookie

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