Revert https://github.com/flarum/core/pull/1536 (#2305)

src/User/UserPolicy.php

@@ -36,7 +36,7 @@ class UserPolicy extends AbstractPolicy
      */
     public function find(User $actor, Builder $query)
     {
-        if ($actor->cannot('viewUserList')) {
+        if ($actor->cannot('viewDiscussions')) {
             if ($actor->isGuest()) {
                 $query->whereRaw('FALSE');
             } else {

tests/integration/api/users/UpdateTest.php

@@ -35,6 +35,7 @@ class UpdateTest extends TestCase
             ],
             'group_permission' => [
                 ['permission' => 'viewUserList', 'group_id' => 3],
+                ['permission' => 'viewDiscussions', 'group_id' => 3]
             ]
         ]);
     }