finally fix the header overlay triggering scrollbar
finally fix the header overlay triggering scrollbar

mzikherman/force,artsy/force,kanaabe/force,eessex/force,anandaroop/force,artsy/force,erikdstock/force,damassi/force,oxaudo/force,izakp/force,dblock/force,joeyAghion/force,yuki24/force,oxaudo/force,eessex/force,eessex/force,xtina-starr/force,TribeMedia/force-public,yuki24/force,erikdstock/force,kanaabe/force,anandaroop/force,eessex/force,damassi/force,yuki24/force,artsy/force-public,cavvia/force-1,dblock/force,damassi/force,erikdstock/force,kanaabe/force,izakp/force,cavvia/force-1,artsy/force,mzikherman/force,dblock/force,artsy/force-public,mzikherman/force,izakp/force,anandaroop/force,oxaudo/force,mzikherman/force,joeyAghion/force,cavvia/force-1,kanaabe/force,TribeMedia/force-public,joeyAghion/force,xtina-starr/force,izakp/force,joeyAghion/force,cavvia/force-1,yuki24/force,erikdstock/force,damassi/force,artsy/force,xtina-starr/force,kanaabe/force,anandaroop/force,xtina-starr/force,oxaudo/force