title: NSSplitVIew - auto saving divider positions doesn't work with auto layout enabled
body: <p>With auto layout enabled, auto saving divider positions by setting an autosave name for the NSSplitView in interface builder results in each divider being completely collapsed on an app restart. Disabling auto layout allows auto save works perfectly.</p>
  
  <p>I have tried this in a new Xcode project as well, same result. Is this a bug, or a known incompatibility?</p>
  
  <p>How could I work around this (or is there a fix to this, if it is a bug)?</p>