Return false when modified is not saved and not created

The return of modified_save method is used to decide to execute an action or
not. When a new record is cancelled, the client select the previous record so
we must not run the action on this one.

issue9881
review337111002

tryton/gui/window/form.py

@@ -553,7 +553,9 @@ class Form(SignalEvent, TabContent):
             if value == 'ok':
                 return self.sig_save(None)
             if value == 'ko':
-                return self.sig_reload(test_modified=False)
+                record_id = self.screen.current_record.id
+                if self.sig_reload(test_modified=False):
+                    return record_id == self.screen.current_record.id
             return False
         return True