Hide the blurb of a user when that user is disabled
Test Plan: Disabled a user, then made sure their blurb disappeared.
Reviewers: O1 Blessed Committers, avivey, speck
Reviewed By: O1 Blessed Committers, avivey, speck
Subscribers: 20after4, avivey, speck, tobiaswiese, valerio.bozzolan
Maniphest Tasks: T15074
Differential Revision: https://we.phorge.it/D25035