Andreas Kling c9cd795257 LibWeb: Don't lose change events on MediaQueryList internal state change ...

MediaQueryList will now remember if a state change occurred when
evaluating its match state. This memory can then be used by the document
later on when it's updating all queries, to ensure that we don't forget
to fire at least one change event.

This also required plumbing the system visibility state to initial
about:blank documents, since otherwise they would be stuck in "hidden"
state indefinitely and never evaluate their media queries.

2025-02-13 20:52:31 +01:00

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