Media query tests - scan and grid

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Two media queries concerned with output devices.

scan

CSS3 spec | CSS4 spec

The scan media query describes the scanning process of TVs: progressive or interlaced. The query should not be supported by non-TV devices.

values

grid

CSS3 spec | CSS4 spec

The grid media query describes whether the device output (screen) is a grid; like an old-fashioned terminal.

values

update-frequency

CSS4 spec

The update-frequency media query describes how often the content is modified.

values