[FIX] honor sequence

fetchmail_attach_from_folder/model/fetchmail_server_folder.py

@@ -26,6 +26,7 @@ from .. import match_algorithm
 class fetchmail_server_folder(models.Model):
     _name = 'fetchmail.server.folder'
     _rec_name = 'path'
+    _order = 'sequence'
 
     def _get_match_algorithms(self):
         def get_all_subclasses(cls):

fetchmail_attach_from_folder/view/fetchmail_server.xml

@@ -17,7 +17,7 @@
                                 nolabel="1"
                                 on_change="onchange_server_type(type, is_ssl, object_id)">
                                 <tree>
-                                    <field name="sequence" invisible="1" />
+                                    <field name="sequence" widget="handle" />
                                     <field name="path" />
                                     <field name="model_id" />
                                     <field name="model_field" />