Update to upstream unbatched PlainEditor #2353

Job	Run time
cargo check (msrv) (wasm32)	28s
cargo check (msrv) (windows-latest)	3m 54s
cargo check (aarch64-android)	1m 18s
cargo check (msrv) (macos-latest)	1m 24s
cargo clippy (windows-latest)	8m 38s
cargo check (msrv) (ubuntu-latest)	1m 52s
cargo clippy (wasm32)	3m 59s
cargo clippy (macos-latest)	5m 3s
cargo doc	1m 54s
cargo clippy (ubuntu-latest)	5m 54s
Prime LFS Cache	5s
cargo test (wasm32)	1m 5s
formatting	30s
typos	7s
cargo test (windows-latest)	7m 34s
cargo test (macos-latest)	3m 21s
cargo test (ubuntu-latest)	6m 20s
	53m 26s

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