I have created some cues in the Activity page - now they show up in the Navigation Pane. I do not quite see the idea in this as they're available from the Activity Page.
One reason could be easier keyboard access.
But the relation is a problem - I have two sections: Sales and Purchase. To show the full text on the cues I have renamed some of them to just Invoices. This is not a problem on the activity page as the two are listed in separate sections.
In the Navigation Pane I now have two Invoices menues - without the possibility to determine which is which. #-o