Bug 317470 Minimized 'Outline' view has non-white background on restart
1. Minimize the 'Outline' view. 2. Close Eclipse. 3. Start Eclipse. 4. Restore the 'Outline' view. 5. Its background colour is grey instead of white.
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java
parentContext = getContext(element.getParent());
		} else if (parentContext == null && element.getParent() == null) {
			parentContext = getContext((MElementContainer<MUIElement>) ((EObjectImpl) element)
					.eContainer());
		}
		return createGui(element, parent, parentContext);
	}
	private Shell getLimboShell() {
		if (limbo == null) {
			limbo = new Shell(Display.getCurrent(), SWT.NONE);
			limbo.setData(ShellActivationListener.DIALOG_IGNORE_KEY,
					Boolean.TRUE);
		}
		return limbo;
	}
	/**
	 * @param element
	 */
	public void removeGui(MUIElement element) {
		
		
		final MWindow win = modelService.getTopLevelWindowFor(element);
		if (win != null) {
			if (win != element) {
				
				unhookReferences(element, win.getContext());
			} else {
				
				List<MUIElement> seList = win.getSharedElements();
				for (MUIElement se : seList) {