Register all buttons are registered in ir.model.button

issue6389
review36621002

view/work_form.xml

@@ -20,7 +20,7 @@ this repository contains the full copyright notices and license terms. -->
     </xpath>
     <xpath expr="/form/notebook/page[@id='general']/group/group[@id='buttons']"
         position="inside">
-        <button string="Invoice" name="invoice"/>
+        <button name="invoice"/>
     </xpath>
     <xpath expr="/form/notebook" position="inside">
         <page name="invoiced_progress">

work.xml

@@ -11,6 +11,7 @@ this repository contains the full copyright notices and license terms. -->
 
         <record model="ir.model.button" id="work_invoice_button">
             <field name="name">invoice</field>
+            <field name="string">Invoice</field>
             <field name="model" search="[('model', '=', 'project.work')]"/>
         </record>
         <record model="ir.model.button-res.group"