Temporarily revert my last check-in so Mayavi trees continue to work while I debug a problem where TreeEditors cannot handle children that are Properties.
Temporarily revert my last check-in so Mayavi trees continue to work while I debug a problem where TreeEditors cannot handle children that are Properties.

liulion/mayavi,liulion/mayavi,alexandreleroux/mayavi,alexandreleroux/mayavi,dmsurti/mayavi,dmsurti/mayavi