R1:26d6096e0a5b

When reviewing, always show "Accept" checkboxes for packages/projects, even if there's only one checkbox

Summary: Fixes T12533.

Test Plan: {F4853371}

Reviewers: chad, lvital

Reviewed By: lvital

Maniphest Tasks: T12533

Differential Revision: https://secure.phabricator.com/D17652