R1:1e4e121956e7

Put Spaces on Hovercards and ObjectItemLists

Summary: Ref T8449.

Test Plan:
{F474186}

{F474187}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: chad, epriestley

Maniphest Tasks: T8449

Differential Revision: https://secure.phabricator.com/D13173