Cannot scroll down far enough. Cannot edit control points of a Shape. Overscroll enabled.

Overscroll is limited so that a corner of document canvas must be visible. I'm unable to edit path that is below the visible canvas.

1. Create an empty document, say 100x100 pixels.
2. Create a vertical line (Shape) that extends a little below the bottom edge of the canvas. 
       
3. Make sure the Preferences>Tools>Overscroll is enabled.
4. Zoom in to the top of the line so that you can see the Pixel Grid (make sure View>Show>Pixel Grid is enabled). The control points are visible, This works as expected.
   
5. Zoom out, then try to zoom in to the bottom of the line, past the canvas edge. I cannot scroll down to see the bottom control points. 
   

Actual result: even when Overscroll is enabled I'm unable to scroll down to access control points of a line (Shape) that are outside of a canvas.

Expected results: when Overscroll is enabled I can access control points even if they are outside of a canvas