Fix tree-structure tracking in `AnyView` and `ScrollView` #182

Job	Run time
cargo doc (windows-latest)	1m 11s
cargo clippy + test (windows-latest)	2m 24s
cargo fmt	12s
cargo doc (macos-latest)	1m 1s
cargo clippy + test (macos-latest)	2m 22s
cargo doc (ubuntu-latest)	34s
cargo clippy + test (ubuntu-latest)	1m 18s
	9m 2s

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