erp5_mrp_quality_assurance: use reference, search by title is slow

bt5/erp5_mrp_quality_assurance/SkinTemplateItem/portal_skins/erp5_mrp_quality_assurance/QualityAssuranceModule_viewQualityControlList/listbox.xml

@@ -100,7 +100,7 @@
                           <string>Delivery</string>
                         </tuple>
                         <tuple>
-                          <string>aggregate_title</string>
+                          <string>aggregate_reference</string>
                           <string>VIN</string>
                         </tuple>
                         <tuple>