refs #6406 added dijit_a11y classes to put borders on borderContainer splitters. 
refs #6406 added dijit_a11y classes to put borders on borderContainer splitters. 

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@13369 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful