Show primary email in approval queue interface

Summary:
Request from @csilvers. When approving users, the primary email address is useful for administrators.

(This queue is only accessible by administrators, so this doesn't expose email information in general.)

Test Plan: {F132912}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: shadowhand, csilvers, epriestley

Differential Revision: https://secure.phabricator.com/D8589

src/applications/people/controller/PhabricatorPeopleListController.php

@@ -62,6 +62,10 @@ final class PhabricatorPeopleListController extends PhabricatorPeopleController
         ->addAttribute($email)
         ->setImageURI($user->getProfileImageURI());
 
+      if ($is_approval && $primary_email) {
+        $item->addAttribute($primary_email->getAddress());
+      }
+
       if ($user->getIsDisabled()) {
         $item->addIcon('disable', pht('Disabled'));
       }