Hide "Availability" and "Calendar" on user profiles for disabled users

Summary:
See downstream <https://phabricator.wikimedia.org/T138723>. That suggestion is a little light on details, but I basically agree that showing "Availability: Available" on disabled user profiles is kind of questionable/misleading.

Just hide event information on disabled profiles, since this doesn't seem worth building a special "Availability: Who Knows, They Are Disabled, Good Luck" disabled state for.

Test Plan: Looked at disabled and non-disabled user profiles, saw Calendar stuff only on the former.

Reviewers: amckinley

Reviewed By: amckinley

Differential Revision: https://secure.phabricator.com/D20342

src/applications/people/controller/PhabricatorPeopleProfileViewController.php

@@ -175,6 +175,12 @@ final class PhabricatorPeopleProfileViewController
       return null;
     }
 
+    // Don't show calendar information for disabled users, since it's probably
+    // not useful or accurate and may be misleading.
+    if ($user->getIsDisabled()) {
+      return null;
+    }
+
     $midnight = PhabricatorTime::getTodayMidnightDateTime($viewer);
     $week_end = clone $midnight;
     $week_end = $week_end->modify('+3 days');

src/applications/people/customfield/PhabricatorUserStatusField.php

@@ -30,6 +30,12 @@ final class PhabricatorUserStatusField
     $user = $this->getObject();
     $viewer = $this->requireViewer();
 
+    // Don't show availability for disabled users, since this is vaguely
+    // misleading to say "Availability: Available" and probably not useful.
+    if ($user->getIsDisabled()) {
+      return null;
+    }
+
     return id(new PHUIUserAvailabilityView())
       ->setViewer($viewer)
       ->setAvailableUser($user);