Bug 326175 WBWRenderer arbitrarily modifies the window's parent's active context chain
The window's parent's context arbitrarily changes its active child to the window being rendered in createWidget(*).
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/WBWRenderer.java
.getProperty(UIEvents.EventTags.NEW_VALUE);
					theShell.setToolTipText(newTTip);
				}
			}
		};
		eventBroker.subscribe(UIEvents.buildTopic(UIEvents.UILabel.TOPIC),
				shellUpdater);
		visibilityHandler = new EventHandler() {
			public void handleEvent(Event event) {
				
				Object objElement = event
						.getProperty(UIEvents.EventTags.ELEMENT);
				if (!(objElement instanceof MWindow))
					return;
				
				MWindow windowModel = (MWindow) objElement;
				if (windowModel.getRenderer() != WBWRenderer.this)
					return;
				
				Shell theShell = (Shell) windowModel.getWidget();
				if (theShell == null)
					return;
				String attName = (String) event
						.getProperty(UIEvents.EventTags.ATTNAME);
				if (UIEvents.UIElement.VISIBLE.equals(attName)) {
					boolean isVisible = (Boolean) event
							.getProperty(UIEvents.EventTags.NEW_VALUE);
					theShell.setVisible(isVisible);
				}
			}