Bug 325836 EPartService's createSharedPart(*) methods should not need its MWindow parameter
The service should only be interacting with its own window and not some other random window.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java
* <p>
	 * <ul>
	 * <li>If there cannot be multiple parts of this type and a part already exists, the already
	 * existing part will be shown and returned.</li>
	 * <li>If multiple parts of this type is allowed, then the provided part will be shown and
	 * returned</li>
	 * </ul>
	 * </p>
	 * <p>
	 * The behavior of this method is dictated by the supplied state. If <code>ACTIVATE</code> is
	 * supplied, then the part is made visible and granted focus. If <code>VISIBLE</code> is
	 * supplied, then the part will be made visible but not given focus. If <code>CREATE</code> is
	 * supplied, then the part will be instantiated though its contents may not necessarily be
	 * visible to the end user.
	 * </p>
	 * 
	 * @param part
	 *            the part to show
	 * @param partState
	 *            the desired state of the shown part to be in
	 * @return the shown part
	 */
	public MPart showPart(MPart part, PartState partState);
	/**
	 * Hides the given part. The part must be a part managed by this service.
	 * <p>
	 * If the part has been tagged with the {@link #REMOVE_ON_HIDE_TAG} tag, it will be removed from
	 * the model when the service hides it.
	 * </p>
	 *