scrollbarAdjust = function ( node, width ) {
            if ( ! oOverflow.bar ) {
                // If there is no scrollbar (Macs) we need to hide the auto scrollbar
                node.style.width = (width+20)+"px";
                node.style.paddingRight = "20px";
                node.style.boxSizing = "border-box";
            }
            else {
                // Otherwise just overflow by the scrollbar
                node.style.width = (width+oOverflow.bar)+"px";
            }
        }
Style and position the grid used for the FixedColumns layout
 @returns {void}
 @private