Bug 319169 [UI] active parts in Detached windows prevent activating a part in the main window
Start with a fresh WS Detach the Outline view using DnD Now you can no longer activate any part in the main window (i.e. Package Explorer). The cause seems to be that the 'rootContainer' has become the DW's MTrimmedWindow rather than the DW's containing MPerspective. This causes the PartService's 'activate' to fail the 'isInContainer()' test...
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
}
	public void testSavePart_NoHandler_TFF() {
		testSavePart_NoHandler(true, false, false);
	}
	public void testSavePart_NoHandler_FTT() {
		testSavePart_NoHandler(false, true, true);
	}
	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,