Fix dijit.hasDefaultTabStop() to detect that Editor on webkit is focusable.   Editor on webkit has contentEditable on a <div> inside of <body> inside of the <iframe>.   Fixes #12109.
Fix dijit.hasDefaultTabStop() to detect that Editor on webkit is focusable.   Editor on webkit has contentEditable on a <div> inside of <body> inside of the <iframe>.   Fixes #12109.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@23450 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful