xilem: Button with customisable label(text) #2451

Job	Run time
cargo check (aarch64-android)	33s
cargo check (msrv) (wasm32)	19s
cargo clippy (windows-latest)	5m 6s
cargo check (msrv) (windows-latest)	1m 54s
cargo clippy (macos-latest)	2m 29s
cargo check (msrv) (macos-latest)	32s
cargo clippy (wasm32)	2m 4s
cargo doc	1m 51s
cargo clippy (ubuntu-latest)	3m 21s
cargo check (msrv) (ubuntu-latest)	50s
formatting	30s
Prime LFS Cache	8s
cargo test (wasm32)	23s
typos	7s
cargo test (windows-latest)	3m 15s
cargo test (macos-latest)	1m 22s
cargo test (ubuntu-latest)	3m 5s
	27m 49s

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