Add set_mouse_pass_through and is_foreground_window #5780

Job	Run time
cargo clippy+test (wayland)	1m 7s
cargo fmt	23s
Docs (windows-latest)	1m 16s
druid doctests	41s
cargo clippy+test (windows-latest)	1m 47s
Docs (macos-latest)	39s
cargo clippy+test (gtk)	1m 9s
cargo clippy+test (macos-latest)	1m 10s
Docs (ubuntu-latest)	1m 22s
cargo clippy+test (ubuntu-latest)	1m 20s
cargo test (wasm32)	2m 12s
mdbook build	11s
	13m 17s

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