Add padding attribute to `sized_box` view #2095

Job	Run time
cargo clippy (wasm32)	1m 12s
formatting	32s
cargo clippy (windows-latest)	2m 48s
Prime LFS Cache	5s
cargo clippy (macos-latest)	1m 26s
cargo check (msrv) (windows-latest)	2m 3s
cargo clippy (ubuntu-latest)	2m 13s
cargo check (msrv) (wasm32)	21s
cargo check (msrv) (macos-latest)	33s
cargo check (aarch64-android)	21s
cargo check (msrv) (ubuntu-latest)	44s
cargo doc	46s
cargo test (wasm32)	20s
typos	3s
cargo test (windows-latest)	4m 1s
cargo test (macos-latest)	1m 30s
cargo test (ubuntu-latest)	3m 46s
	22m 44s

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