cockpit: Update description

This is primary due to changes in the way Cockpit is doing authentication.

- Only admin users are allowed now. Users outside the admin group won't be able
  to login.

- All functions are working (if the reuse password for system functions box is
  checked during login).

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Joseph Nuthalapati <njoseph@thoughtworks.com>

plinth/modules/cockpit/__init__.py

@@ -50,11 +50,9 @@ description = [
     format_lazy(
         _('When enabled, Cockpit will be available from <a href="/_cockpit/">'
           '/_cockpit/</a> path on the web server. It can be accessed by '
-          '<a href="{users_url}">any user</a> with a {box_name} login. '
-          'Sensitive information and system altering abilities are limited to '
-          'users belonging to admin group.'), box_name=_(cfg.box_name),
+          '<a href="{users_url}">any user</a> on {box_name} belonging to '
+          'the admin group.'), box_name=_(cfg.box_name),
         users_url=reverse_lazy('users:index')),
-    _('Currently only limited functionality is available.'),
 ]
 
 service = None