Re: [whatwg/fullscreen] Reinstate the hierarchy restrictions (#91)

@upsuper, in addition to these changes, something needs to be done to uphold the invariant when mixed with `dialog`. I see two options:
* Add checks in HTML to avoid moving elements within top layer if it would end up violating the hierarchy restrictions.
* Add something in https://fullscreen.spec.whatwg.org/#top-layer-add to remove elements to maintain the invariants.

What does Gecko do?

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Received on Monday, 22 May 2017 13:20:24 UTC