Fix problem where down arrow on !MenuBarItem moves to next item in !MenuBar.   Also general test cleanup.   Fixes #15148 !strict.
Fix problem where down arrow on !MenuBarItem moves to next item in !MenuBar.   Also general test cleanup.   Fixes #15148 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@28301 560b804f-0ae3-0310-86f3-f6aa0a117693

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