Make apps launcher more size resilient

Summary: We can be a little more targeted and make the descriptions more readable here. Fixes T5265

Test Plan: Test apps launcher at different breakpoints

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5265

Differential Revision: https://secure.phabricator.com/D9381