Bug 182661 Cross Tab: Need to support "New Data Cube" from menu bar
Please look at the UI mockup as reference to support "New Data Cube" on dropdown menu from Menu bar.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/DesignerActionBarContributor.java
newMenu.add( editStyleMenu );
		
		MenuManager applyStyleMenu = new MenuManager( Messages.getString( "DesignerActionBarContributor.menu.style-rule-apply" ) ); 
		applyStyleMenu.add( NoneAction.getInstance( ) );
		applyStyleMenu.addMenuListener( new IMenuListener( ) {
			public void menuAboutToShow( IMenuManager manager )
			{
				updateDynamicItems( ApplyStyleMenuAction.ID, manager );
			}
		} );
		newMenu.add( applyStyleMenu );
	}
	private void updateDynamicItems( String actionId, IMenuManager menu )
	{
		RetargetAction action = (RetargetAction) getAction( actionId );
		if ( action != null
				&& action.getActionHandler( ) instanceof MenuUpdateAction )
		{
			( (MenuUpdateAction) action.getActionHandler( ) ).updateMenu( (MenuManager) menu );
		}
	}
	private void updateInsertGroupMenu( String actionId, IMenuManager menu )
	{
		RetargetAction action = (RetargetAction) getAction( actionId );
		if ( action != null
				&& action.getActionHandler( ) instanceof InsertGroupMenuAction )
		{
			( (InsertGroupMenuAction) action.getActionHandler( ) ).updateMenu( (MenuManager) menu );
		}
	}