Fixes #15433.  Proxy commit for mibeb.  Add role=presentation to Editor plugins for screen reader control.
Fixes #15433.  Proxy commit for mibeb.  Add role=presentation to Editor plugins for screen reader control.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@28691 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful