Bug 327044 EPartService's hidePart(*) should unset the part's parent element if the part is the selected element
It is not valid to have a selected element that's TBR flag is 'false'.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
public void testSavePart_NoHandler_FTF() {
		testSavePart_NoHandler(false, true, false);
	}
	public void testSavePart_NoHandler_FFT() {
		testSavePart_NoHandler(false, false, true);
	}
	public void testSavePart_NoHandler_FFF() {
		testSavePart_NoHandler(false, false, false);
	}
	private MPart createSaveablePart(
			MElementContainer<MWindowElement> container, boolean beforeDirty) {
		MPart saveablePart = BasicFactoryImpl.eINSTANCE.createPart();
		saveablePart.setDirty(beforeDirty);
		saveablePart
				.setContributionURI("platform:/plugin/org.eclipse.e4.ui.tests/org.eclipse.e4.ui.tests.application.ClientEditor");
		container.getChildren().add(saveablePart);
		return saveablePart;
	}
	private Save prompt(Save[] candidates, MPart partToTest, MPart part) {
		return partToTest == part ? candidates[0] : candidates[1];
	}
	private void testSaveAll(final Save[] returnValues, boolean confirm,
			boolean[] beforeDirty, boolean[] afterDirty, boolean success,
			boolean[] saveCalled, boolean[] throwException) {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		final MPart saveablePart = createSaveablePart(window, beforeDirty[0]);
		final MPart saveablePart2 = createSaveablePart(window, beforeDirty[1]);