Fix IME bug where currently typed characters got copied #9686

Job	Run time
android	20s
Check wasm32 + wasm-bindgen	2m 48s
Format + check + test	6m 4s
cargo-deny aarch64-apple-darwin	38s
Check Windows	1m 22s
cargo-deny aarch64-linux-android	40s
cargo-deny i686-pc-windows-gnu	41s
cargo-deny i686-pc-windows-msvc	36s
cargo-deny i686-unknown-linux-gnu	39s
cargo-deny wasm32-unknown-unknown	40s
cargo-deny x86_64-apple-darwin	41s
cargo-deny x86_64-pc-windows-gnu	40s
cargo-deny x86_64-pc-windows-msvc	39s
cargo-deny x86_64-unknown-linux-gnu	36s
cargo-deny x86_64-unknown-linux-musl	44s
cargo-deny x86_64-unknown-redox	45s
	18m 33s

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