fixes #794: remove scroller bounce in Mac web view
fixes #794: remove scroller bounce in Mac web view

nyimbi/tilemill,mbrukman/tilemill,nyimbi/tilemill,paulovieira/tilemill-clima,mbrukman/tilemill,MappingKat/tilemill,nyimbi/tilemill,florianf/tileoven,Zhao-Qi/tilemill,mbrukman/tilemill,mbrukman/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,fxtentacle/tilemill,Zhao-Qi/tilemill,florianf/tileoven,tizzybec/tilemill,Zhao-Qi/tilemill,tilemill-project/tilemill,fxtentacle/tilemill,paulovieira/tilemill-clima,tizzybec/tilemill,isaacs/tilemill,MappingKat/tilemill,isaacs/tilemill,Zhao-Qi/tilemill,nyimbi/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,isaacs/tilemill,MappingKat/tilemill,fxtentacle/tilemill,florianf/tileoven,Zhao-Qi/tilemill,tizzybec/tilemill,MappingKat/tilemill,paulovieira/tilemill-clima,Teino1978-Corp/Teino1978-Corp-tilemill,paulovieira/tilemill-clima,tizzybec/tilemill,tizzybec/tilemill,paulovieira/tilemill-clima,fxtentacle/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,tilemill-project/tilemill,fxtentacle/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,MappingKat/tilemill,tilemill-project/tilemill,nyimbi/tilemill,mbrukman/tilemill