[e] (0) Move activation stuff from the part of the spec that talks about elements to the part of the spec that talks about user interaction
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24480
Affected topics: DOM APIs, HTML

git-svn-id: http://svn.whatwg.org/webapps@8453 340c8d12-0b0e-0410-8428-c7bf67bfef74