R1:71060c4b6d4a

[redesign] Use ellipses if app description is long

Summary: Truncate with CSS ellipses if the app description is longer than needed. (Can rework text as well)

Test Plan: sandbox

Reviewers: epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9349