Bug 53098 [KeyBindings] KeyBinding service must bind (DEL) key to ActionFactory.DELETE
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
});
		menu.add(new Action("Remove context B from the workbench") {
			public void run() {
				IWorkbench workbench = PlatformUI.getWorkbench();
				IWorkbenchContextSupport workbenchContextSupport = (IWorkbenchContextSupport) workbench.getContextSupport();
				workbenchContextSupport.getCompoundContextActivationService().removeContextActivationService(contextActivationServiceB);
			}
		});
		
		menu.add(new Separator());
		
		menu.add(new Action("Add context A to 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().addContextActivationService(contextActivationServiceA);
					}
				}
			}
		});
		
		menu.add(new Action("Remove context A from the workbench page") {
			public void run() {
				IWorkbench workbench = PlatformUI.getWorkbench();
				IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();