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
IWorkbenchActivitySupport workbenchActivitySupport = getWindow().getWorkbench().getActivitySupport();
		
		IActivityManager activityManager = workbenchActivitySupport.getActivityManager();
				
		if (!activityManager.getDefinedCategoryIds().isEmpty()) { 
			categoryAction = ActionFactory.CONFIGURE_ACTIVITIES.create(getWindow());
        	registerGlobalAction(categoryAction);
		}		
		
		if (WorkbenchPlugin.getDefault().getIntroRegistry().getIntroCount() > 0) {
			introAction = ActionFactory.INTRO.create(window);
			registerGlobalAction(introAction);
		}
	}
	private void setCurrentActionBarConfigurer(IActionBarConfigurer actionBarConfigurer)
	{
		this.actionBarConfigurer = actionBarConfigurer;
	}
	
	private void registerGlobalAction(IAction action) {
		actionBarConfigurer.registerGlobalAction(action);
	}
	
	/**
	 * Update the build actions on the toolbar and menu bar based on the 
	 * current state of autobuild
	 */
	void updateBuildActions(boolean autoBuilding) {