Workaround IE9 behavior where down arrowing through !TreeNodes doesn't show focus outline.   Also removing some rules for FF3.   Fixes #16231.
Workaround IE9 behavior where down arrowing through !TreeNodes doesn't show focus outline.   Also removing some rules for FF3.   Fixes #16231.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@29877 560b804f-0ae3-0310-86f3-f6aa0a117693

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