Fix long project names in policy controls

Summary: Fixes T12366. Adds a text-overflow to policy buttons.

Test Plan: Set a view policy to MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM

Reviewers: epriestley, eliaspro

Reviewed By: epriestley, eliaspro

Subscribers: eliaspro, Korvin

Maniphest Tasks: T12366

Differential Revision: https://secure.phabricator.com/D17478