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
IPreferenceStore store = IDEWorkbenchPlugin.getDefault().getPreferenceStore();
		boolean promptOnExit =	store.getBoolean(IDEInternalPreferences.EXIT_PROMPT_ON_CLOSE_LAST_WINDOW);
		if (promptOnExit) {
			String message;
			String productName = null;
			AboutInfo about = IDEWorkbenchPlugin.getDefault().getPrimaryInfo();
			if (about != null) {
				productName = about.getProductName();
			}
			if (productName == null) {
				message = IDEWorkbenchMessages.getString("PromptOnExitDialog.message0"); 
			} else {
				message = IDEWorkbenchMessages.format("PromptOnExitDialog.message1", new Object[] { productName }); 
			}
			MessageDialogWithToggle dlg = MessageDialogWithToggle.openConfirm(
				windowConfigurer.getWindow().getShell(), 
				IDEWorkbenchMessages.getString("PromptOnExitDialog.shellTitle"), 
				message,
				IDEWorkbenchMessages.getString("PromptOnExitDialog.choice"), 
				false);
			if (dlg.getReturnCode() == Window.OK) {
				store.setValue(
					IDEInternalPreferences.EXIT_PROMPT_ON_CLOSE_LAST_WINDOW,
					!dlg.getToggleState());
				return true;
			} else {
				return false;
			}
		}
		return true;