trade: Movement_isQuantityEditable should also work for orders

There should be no reasons to look at items through aggregate only on delivery line,
this should also be usable on order lines

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/Movement_isQuantityEditable.xml

@@ -68,8 +68,7 @@ if not context.isMovement():\n
 if context.getVariationCategoryList() and not \'Cell\' in context.getPortalType():\n
   return False\n
 \n
-return not (context.getPortalType() in context.getPortalDeliveryMovementTypeList()\n
-      and (context.getResource() and context.getResourceValue().getAggregatedPortalTypeList()))\n
+return not (context.getResource() and context.getResourceValue().getAggregatedPortalTypeList())\n
 </string> </value>
         </item>
         <item>