xilem: Button with customisable label(text) #2461

Job	Run time
cargo check (msrv) (wasm32)	21s
cargo check (aarch64-android)	20s
cargo clippy (windows-latest)	29s
cargo check (msrv) (windows-latest)	1m 37s
cargo clippy (macos-latest)	27s
cargo clippy (ubuntu-latest)	32s
cargo check (msrv) (macos-latest)	38s
cargo clippy (wasm32)	1m 57s
cargo doc	38s
cargo check (msrv) (ubuntu-latest)	38s
formatting	35s
Prime LFS Cache	3s
cargo test (wasm32)	19s
typos	4s
cargo test (windows-latest)	3m 5s
cargo test (macos-latest)	1m 51s
cargo test (ubuntu-latest)	2m 59s
	16m 33s

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