[FIX] account: open form view when single invoice generated

Before this commit, there was no difference whether multiple invoices
were uploaded or not. The list view was always opened.

Now, the form view is automatically opened when a single bill
is uploaded.

Task-ID: 2152183

addons/account/models/account_journal.py

@@ -659,14 +659,20 @@ class AccountJournal(models.Model):
             'name': _('Generated Documents'),
             'domain': [('id', 'in', invoices.ids)],
             'res_model': 'account.move',
-            'views': [[False, "tree"], [False, "form"]],
             'type': 'ir.actions.act_window',
             'context': self._context
         }
         if len(invoices) == 1:
-            action_vals.update({'res_id': invoices[0].id, 'view_mode': 'form'})
+            action_vals.update({
+                'views': [[False, "form"]],
+                'view_mode': 'form',
+                'res_id': invoices[0].id,
+            })
         else:
-            action_vals['view_mode'] = 'tree,form'
+            action_vals.update({
+                'views': [[False, "tree"], [False, "form"]],
+                'view_mode': 'tree,form',
+            })
         return action_vals
 
     def _create_invoice_from_single_attachment(self, attachment):