enable range acessor range for quantity property

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17587 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/Amount.py

@@ -83,6 +83,7 @@ class Amount:
     { 'id'          : 'quantity',
       'description' : """The quantity of resource.""",
       'type'        : 'float',
+      'range'       : True,
       'default'     : 0.0,
       'acquisition_base_category'     : ('order','delivery',),
       'acquisition_portal_type'       : Expression('python: portal.getPortalAcquisitionMovementTypeList() + portal.getPortalDeliveryTypeList()'),