Re: [presentation-api] Add note about controlling browsing contexts. (#487)

I suppose Web developers can detect that they may try to start a new presentation from an existing presentation simply by assessing whether `window.PresentationRequest` exists in the receiving browsing context. Would it be worth completing the note to say so, similar to the note in [section 6.2.2](https://w3c.github.io/presentation-api/#receiving-user-agent)?


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Received on Monday, 19 October 2020 07:38:34 UTC