Fix viewport not working when minimized #12505

Job	Run time
Format + check + test	5m 30s
android	27s
cargo-deny aarch64-apple-darwin	39s
cargo-deny aarch64-linux-android	36s
cargo-deny i686-pc-windows-gnu	38s
cargo-deny i686-pc-windows-msvc	40s
Check wasm32 + wasm-bindgen	2m 21s
cargo-deny i686-unknown-linux-gnu	37s
ios	20s
cargo-deny wasm32-unknown-unknown	41s
Check Windows	1m 34s
cargo-deny x86_64-apple-darwin	40s
cargo-deny x86_64-pc-windows-gnu	38s
cargo-deny x86_64-pc-windows-msvc	39s
cargo-deny x86_64-unknown-linux-gnu	41s
cargo-deny x86_64-unknown-linux-musl	39s
cargo-deny x86_64-unknown-redox	38s
	17m 58s

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