Andreas Kling 55ebd8a589 LibWeb: Ignore invalidation rule order when merging plans ...

Treat structurally equivalent invalidation plans as equal even when
their descendant or sibling rules were accumulated in a different
order. This lets :has() invalidation merge more of the repeated
descendant-only payloads that still showed up after the earlier
structural dedup.

Add a :has() invalidation counter test that exercises equivalent
selector permutations so this shape stays covered.

2026-04-20 13:20:41 +02:00

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