Update CSS to Fix Layout in Safari
Update CSS to Fix Layout in Safari

Safari does not support the `unset` value of CSS3. Changing it to `initial`
seems to work for now.

tilpner/rust-playpen,plietar/pony-playpen,rust-lang/rust-playpen,rust-lang/rust-playpen,tilpner/rust-playpen,plietar/pony-playpen,rust-lang/rust-playpen,plietar/pony-playpen,tilpner/rust-playpen,plietar/pony-playpen,rust-lang/rust-playpen,tilpner/rust-playpen