[FIX] mail: action buttons passed arguments positionnally, which caused the context to be passed as another argument. An intermediary function screens the arguments before calling send_mail.

addons/mail/wizard/mail_compose_message.py

@@ -227,6 +227,10 @@ class mail_compose_message(osv.TransientModel):
     #------------------------------------------------------
     # Wizard validation and send
     #------------------------------------------------------
+    # action buttons call with positionnal arguments only, so we need an intermediary function
+    # to ensure the context is passed correctly
+    def send_mail_action(self, cr, uid, ids, context=None):
+        self.send_mail(cr, uid, ids, context=context)
 
     def send_mail(self, cr, uid, ids, auto_commit=False, context=None):
         """ Process the wizard content and proceed with sending the related

addons/mail/wizard/mail_compose_message_view.xml

@@ -61,7 +61,7 @@
                     <field name="body"/>
                     <field name="attachment_ids" widget="many2many_binary" string="Attach a file"/>
                     <footer>
-                        <button string="Send" name="send_mail" type="object" class="oe_highlight"/>
+                        <button string="Send" name="send_mail_action" type="object" class="oe_highlight"/>
                         or
                         <button string="Cancel" class="oe_link" special="cancel" />