specify portal_types in listbox

usually generated SQL query can use a better index this way

bt5/erp5_direct_debit_payment/SkinTemplateItem/portal_skins/erp5_direct_debit_payment/DirectDebitMandateModule_viewDirectDebitMandateList/listbox.xml

@@ -12,6 +12,7 @@
               <list>
                 <string>all_columns</string>
                 <string>columns</string>
+                <string>portal_types</string>
                 <string>selection_name</string>
                 <string>title</string>
               </list>
@@ -195,6 +196,17 @@
                       </list>
                     </value>
                 </item>
+                <item>
+                    <key> <string>portal_types</string> </key>
+                    <value>
+                      <list>
+                        <tuple>
+                          <string>Direct Debit Mandate</string>
+                          <string>Direct Debit Mandate</string>
+                        </tuple>
+                      </list>
+                    </value>
+                </item>
                 <item>
                     <key> <string>selection_name</string> </key>
                     <value> <string>direct_debit_mandate_module_selection</string> </value>