Bug 277676 [UI] The workbench should create the contexts
The workbench should create contexts for the model elements, MApplication and MParts (windows, sashes, contributed parts, etc). This is not really the responsibility of the renderers. PW
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/WBPartFactory.java
if (widget instanceof Control) {
			ISWTObservableValue uiTTipObs = SWTObservables
					.observeTooltipText((Control) widget);
			dbc.bindValue(uiTTipObs, emfTTipObs, null, null);
		} else if (widget instanceof org.eclipse.swt.widgets.Item
				&& !(widget instanceof MenuItem)) {
			ISWTObservableValue uiTTipObs = SWTObservables
					.observeTooltipText(widget);
			dbc.bindValue(uiTTipObs, emfTTipObs, null, null);
		}
		
		((EObject) me).eAdapters().add(new AdapterImpl() {
			@Override
			public void notifyChanged(Notification msg) {
				MPart<?> sm = (MPart<?>) msg.getNotifier();
				if (ApplicationPackage.Literals.MITEM__ICON_URI.equals(msg
						.getFeature())) {
					Widget widget = (Widget) sm.getWidget();
					if (widget instanceof org.eclipse.swt.widgets.Item) {
						org.eclipse.swt.widgets.Item item = (org.eclipse.swt.widgets.Item) widget;
						Image image = getImage(sm);
						if (image != null)
							item.setImage(image);
					}
				}
			}
		});
	}
}