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/IDEWorkbenchAdvisor.java
* Open a welcome editor for the given input
	 */
	private void openWelcomeEditor(IWorkbenchWindow window, WelcomeEditorInput input, String perspectiveId) {
		if (getWorkbenchConfigurer().getWorkbench().getWorkbenchWindowCount() == 0) {
			
			
			return;
		}
	
		IWorkbenchWindow win = window;
		if (perspectiveId != null) {
			try {
				win = getWorkbenchConfigurer().getWorkbench().openWorkbenchWindow(perspectiveId, getDefaultPageInput());
				if (win == null) {
					win = window;
				}
			} catch (WorkbenchException e) {
				IDEWorkbenchPlugin.log("Error opening window with welcome perspective.", e.getStatus()); 
				return;
			}
		}
	
		if (win == null) {
			win = getWorkbenchConfigurer().getWorkbench().getWorkbenchWindows()[0];
		}
			
		IWorkbenchPage page = win.getActivePage();
		String id = perspectiveId;
		if (id == null) {
			id = getWorkbenchConfigurer().getWorkbench().getPerspectiveRegistry().getDefaultPerspective();