[mediaqueries] additional types of media features

Hi,


I’d like to propose two new media features namely “embedded” and “preview”.

”embedded” (boolean)
should indicate whether the page is embedded within another one (e.g. iframe)
Use case: I might want to adjust paddings/margins of the page, display/hide logos/ads/navigation


“preview” (Boolean)
should indicate whether the site gets rendered for previewing (e.g. speed dials, visual bookmarks)
Use case: I might want to hide ads / display prominent images for easy identification



Any feedback is appreciated.


Christoph