Arrange commands used with multi-selection have degraded since 1.1

Scenario1: Open attached FXML
Select the PasswordField and ListView
Choose Arrange > Send Backward - BUG - both nodes should move behind the menubar but only the PasswordField does. Repeat the same in 1.1 for correct behaviour.

Scenario2: Open attached FXML
Select the ProgressBar, RadioButton, PasswordField and ListView
Choose Arrange > Send to Back
Choose Edit > Undo - BUG - the original order is not restored. Repeat the same in 1.1 for correct behaviour.