For actions in list views, render name as tooltip if available

Summary: While the icons are sometimes pretty obvious ("X" for delete, "pencil" for edit), some are more obscure ("Disable", "Ignore"), especially if you haven't seen the interface before. If a name is available, render it as a tooltip.

Test Plan: {F49905}

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6434