Bug 55799 [Intro] When new welcome is available, don't show the old one
One of the M8 candidate builds (any): 1) Open Eclipse on a new workspace 2) Close the new Welcome when it opens 3) Close Eclipse 4) Open Eclipse again. Observe: the old Welcome editor is opened. Expectation: when a product has a valid Intro, old welcome should never be shown.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
* be considered as an OLE container menu. Container menus
	 * are preserved in OLE menu merging.
	 */
	public boolean isContainerMenu(String menuId) {
		if (menuId.equals(IWorkbenchActionConstants.M_FILE))
			return true;
		if (menuId.equals(IWorkbenchActionConstants.M_WINDOW))
			return true;
		return false;
	}
	/**
	 * Return whether or not given id matches the id of the coolitems that
	 * the workbench creates.
	 */
	public boolean isWorkbenchCoolItemId(String id) {
		if (IWorkbenchActionConstants.TOOLBAR_FILE.equalsIgnoreCase(id)) return true;
		if (IWorkbenchActionConstants.TOOLBAR_NAVIGATE.equalsIgnoreCase(id)) return true;
		return false;
	}
	/**
	 * Fills the status line with the workbench contribution items.
	 */
	public void populateStatusLine(IActionBarConfigurer configurer) {
		IStatusLineManager statusLine = configurer.getStatusLineManager();
		statusLine.add(statusLineItem);
	}
	
	/**
	 * Creates actions (and contribution items) for the menu bar, toolbar and status line.
	 */