fix race conditions with test not waiting for !TreeNodes to expand/collapse before setting aria roles, refs #8000
fix race conditions with test not waiting for !TreeNodes to expand/collapse before setting aria roles, refs #8000

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@30608 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful