webui: change permissions UI to v2

reflect ipalib permission changes in Web UI.

- http://www.freeipa.org/page/V4/Permissions_V2
- http://www.freeipa.org/page/V4/Anonymous_and_All_permissions
- http://www.freeipa.org/page/V4/Managed_Read_permissions
- http://www.freeipa.org/page/V4/Multivalued_target_filters_in_permissions

https://fedorahosted.org/freeipa/ticket/4079

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>
Reviewed-By: Petr Viktorin <pviktori@redhat.com>

ipalib/plugins/internal.py

@@ -506,9 +506,8 @@ class i18n_messages(Command):
                 "enable": "Enable token",
             },
             "permission": {
-                "identity": _("Identity"),
-                "invalid_target": _("Permission with invalid target specification"),
-                "rights": _("Rights"),
+                "identity": _("Permission settings"),
+                "managed": _("Attribute breakdown"),
                 "target": _("Target"),
             },
             "privilege": {