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
IWorkbench workbench = PlatformUI.getWorkbench();
				IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
				if (workbenchWindow != null) {
					IWorkbenchPage workbenchPage = workbenchWindow.getActivePage();
					
					if (workbenchPage != null) {					
						IWorkbenchPageContextSupport workbenchPageContextSupport = (IWorkbenchPageContextSupport) workbenchPage.getContextSupport();
						workbenchPageContextSupport.getCompoundContextActivationService().addContextActivationService(contextActivationServiceA);
					}
				}
			}
		});
		
		menu.add(new Action("Remove context A from the workbench page") {
			public void run() {
				IWorkbench workbench = PlatformUI.getWorkbench();
				IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
				if (workbenchWindow != null) {
					IWorkbenchPage workbenchPage = workbenchWindow.getActivePage();
					
					if (workbenchPage != null) {					
						IWorkbenchPageContextSupport workbenchPageContextSupport = (IWorkbenchPageContextSupport) workbenchPage.getContextSupport();
						workbenchPageContextSupport.getCompoundContextActivationService().removeContextActivationService(contextActivationServiceA);
					}
				}
			}
		});		
		
		menu.add(new Action("Add context B to the workbench page") {
			public void run() {