Tab key will lose focus in "Design" view [was #8484]
1.Select a node in the XML Editor's "Design" view and enter some contents (e.g. an element's value)
2.Press tab to change to the next content field
3.Now the keyboard focus is on the Labs's global menu button bar instead of the next field in the XML Editor
Tested on Ubuntu 10.04, trunk build (~R7862).