title: Flipped vertical coordinates with NSTableView nested within view-based NSTableView
body: <p>I have a view-based NSTableView (within a NSScrollView) which contains a row that has a another NSTableView within a NSScrollView. Everything works nicely until when I click on the innermost table view the coordinate system gets flipped vertically and makes it unusable. If I remove the inner NSScrollView (the superview of the inner table view) then I can click on the table without it getting flipped.</p>
  
  <p>Does anyone have any idea what's causing this? I didn't find any other information on the problem but it appears that nesting NSScrollView is supported.</p>
  
  <p>Thanks.</p>