HostGroupsDashlet: hosts permission is not enough

fixes #1237

doc/82-Changelog.md

@@ -41,6 +41,8 @@ before switching to a new version.
 ### User Interface
 * FIX: Assignment filters suggested only Host properties, you have been required
   to manually type Service property names
+* FIX: Hostgroups Dashlet has been shown to users with restricted permissions,
+  clicking it used to throw an error
 
 1.4.0
 -----

library/Director/Dashboard/Dashlet/HostGroupsDashlet.php

@@ -26,6 +26,6 @@ class HostGroupsDashlet extends Dashlet
 
     public function listRequiredPermissions()
     {
-        return array('director/hosts');
+        return array('director/hostgroups');
     }
 }