Sam Atkins 6bf107fc16 LibWeb: Implement the :open and :closed pseudo-classes ...

These apply to any elements that have some kind of open/closed state.
The spec suggests `<details>`, `<dialog>`, and `<select>`, so that's
what I've supported here. Only `<details>` is fleshed out right now,
but once the others are, these pseudo-classes should work
automatically. :^)

2023-09-13 19:55:22 +02:00

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