title: Hide scrollers while leaving scrolling itself enabled in NSScrollView
body: <p>I'd like to hide the <code>NSScroller</code>s of <code>NSScrollView</code>. I'm aware of the methods <code>setHasHorizontalScroller:</code> and <code>setHasVerticalScroller:</code>. However, if I disable the scrollers, scrolling in that direction gets disabled as well. I'd like to only hide the scrollers while maintaining the possibility to scroll. Any thoughts on this?</p>