[giow] (3) Define designMode to set focus and selection.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=17743
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@7660 340c8d12-0b0e-0410-8428-c7bf67bfef74
[e] (0) Cleanup
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@7661 340c8d12-0b0e-0410-8428-c7bf67bfef74