Implement card style and extras for object item lists

Summary:
Initial pass at elements appearing on M10.

Glaring omissions:

• I cut a single icon out of M10 in a haphazard way.
• No linear graident texture on the cards.

Test Plan:
{F35248}
{F35249}

Reviewers: chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5311