Fix bug with n-level undo of child objects.
Fix bug with n-level undo of child objects.

ronnymgm/csla-light,jonnybee/csla,jonnybee/csla,ronnymgm/csla-light,ronnymgm/csla-light,JasonBock/csla,rockfordlhotka/csla,rockfordlhotka/csla,BrettJaner/csla,rockfordlhotka/csla,BrettJaner/csla,JasonBock/csla,MarimerLLC/csla,MarimerLLC/csla,jonnybee/csla,JasonBock/csla,BrettJaner/csla,MarimerLLC/csla