Bug 870941: Remove CSS rules for overlay scrollbars that became unnecessary. r=roc a=lsblakk
Bug 870941: Display overlay scrollbars on top of content in XUL trees. r=roc a=lsblakk
Bug 870941. Make scrollframes put scrollbars etc above content in z-order if they're disappering scrollbars. r=mattwoodrow a=lsblakk