Yegor 27f1487a70 [web] fix unexpected scrolling in semantics (flutter/engine#53922)
Always mark scrollable containers with `role="group"` to prevent the browser from merging all child elements into one giant string. Default to `preventScroll` to true across the web engine code, because it's a better default for Flutter than otherwise.

Fixes https://github.com/flutter/flutter/issues/130950
2024-07-16 21:04:39 +00:00
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