[FIX] account: Duplicates a refund customer invoice

When clicking on button "Invoices"(below "Print") on a refund
customer invoice, it prints "Refund  + number". But when clicking
on button "Duplicates" it printed "Duplicate + number". Now it prints
" Duplicate refund + number" if the customer invoice is of type out_refund.

opw:708440

addons/account/i18n/account.pot

@@ -397,6 +397,11 @@ msgstr ""
 msgid "<span>Duplicate</span>"
 msgstr ""
 
+#. module: account
+#: model:ir.ui.view,arch_db:account.account_invoice_report_duplicate
+msgid "<span>refund</span>"
+msgstr ""
+
 #. module: account
 #: model:ir.ui.view,arch_db:account.account_journal_dashboard_kanban_view
 msgid "<span>New Bill</span>"

addons/account/views/report_invoice.xml

@@ -166,6 +166,7 @@
     <xpath expr="//h2" position="replace">
         <h2>
             <span>Duplicate</span>
+            <span t-if="o.type == 'out_refund'">refund</span>
             <span t-field="o.number"/>
         </h2>
     </xpath>