Enable meta groups in Model\Group::getIdsByContactId

- Don't return early if contact isn't part of any group in PermissionSet::get

src/Model/Group.php

@@ -117,6 +117,16 @@ class Group
 		}
 		DBA::close($stmt);
 
+		// Meta-groups
+		$contact = Contact::getById($cid, ['rel']);
+		if ($contact['rel'] == Contact::FOLLOWER || $contact['rel'] == Contact::FRIEND) {
+			$return[] = self::FOLLOWERS;
+		}
+
+		if ($contact['rel'] == Contact::FRIEND) {
+			$return[] = self::MUTUALS;
+		}
+
 		return $return;
 	}