Bug 307747 EPartService doesn't render new parts
1. Have a part in a stack, it is the selected part. 2. Show another part in that stack using PartState.CREATE or PartState.VISIBLE. 3. The part should've been rendered. It is not.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/PartServiceImpl.java
Object oldSelected = event.getProperty(UIEvents.EventTags.OLD_VALUE);
				Object selected = event.getProperty(UIEvents.EventTags.NEW_VALUE);
				MPart oldSelectedPart = oldSelected instanceof MPart ? (MPart) oldSelected : null;
				MPart selectedPart = selected instanceof MPart ? (MPart) selected : null;
				if (oldSelectedPart != null && isInContainer(oldSelectedPart)) {
					firePartHidden(oldSelectedPart);
				}
				if (selectedPart != null && selectedPart.isToBeRendered()
						&& isInContainer(selectedPart)) {
					firePartVisible(selectedPart);
					firePartBroughtToTop(selectedPart);
				}
			}
		}
	};
	@Inject
	private MApplication application;
	/**
	 * This is the specific implementation. TODO: generalize it
	 */
	@Inject
	@Named(EPartService.PART_SERVICE_ROOT)
	private MElementContainer<MUIElement> rootContainer;
	@Inject
	private IPresentationEngine engine;
	@Inject
	private EModelService modelService;
	@Inject
	private Logger logger;
	@Inject