Bug 307129 Window context never disposed
1) Run Window->Open Window in legacy IDE -> A context is created for the new window 2) Close the new window -> The context is not disposed
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/WBWRenderer.java
MTrimmedWindow tWindow = (MTrimmedWindow) wbwModel;
			for (MTrimBar trimBar : tWindow.getTrimBars()) {
				renderer.createGui(trimBar, shell);
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.e4.ui.workbench.swt.internal.AbstractPartRenderer#getUIContainer
	 * (org.eclipse.e4.ui.model.application.MUIElement)
	 */
	@Override
	public Object getUIContainer(MUIElement element) {
		Composite shellComp = (Composite) element.getParent().getWidget();
		TrimmedPartLayout tpl = (TrimmedPartLayout) shellComp.getLayout();
		return tpl.clientArea;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.e4.workbench.ui.renderers.PartFactory#postProcess(org.eclipse
	 * .e4.ui.model.application.MPart)
	 */
	@Override
	public void postProcess(MUIElement childME) {
		super.postProcess(childME);
		Shell shell = (Shell) childME.getWidget();