Replace startupKeyNavChildren() with startup(), so that subclasses don't need to explicitly call startupKeyNavChildren().    Also some minor cleanup.    Refs #11712 !strict.
Replace startupKeyNavChildren() with startup(), so that subclasses don't need to explicitly call startupKeyNavChildren().
 
 Also some minor cleanup.
 
 Refs #11712 !strict.


git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@24903 560b804f-0ae3-0310-86f3-f6aa0a117693

Sam-Cummins/delite,kitsonk/delite,harbalk/delite,harbalk/delite,Sam-Cummins/delite,kitsonk/delite