refs #4697. Added a focusable element into one of the pages of the stack container to test keyboard behavior when focus is within a pane.
refs #4697. Added a focusable element into one of the pages of the stack container to test keyboard behavior when focus is within a pane.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@10788 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful