Add set_mouse_pass_through and is_foreground_window #5773

Job	Run time
cargo clippy+test (wayland)	1m 19s
cargo clippy+test (gtk)	1m 9s
druid doctests	1m 26s
Docs (windows-latest)	2m 39s
mdbook build	1m 55s
Docs (macos-latest)	1m 11s
cargo fmt	11s
Docs (ubuntu-latest)	3m 52s
cargo clippy+test (windows-latest)	44s
cargo test (wasm32)	41s
cargo clippy+test (macos-latest)	43s
cargo clippy+test (ubuntu-latest)	1m 2s
	16m 52s

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