Navigation / Routing incorporating via locations

The navigation function including the instant recalculation is great, but I would like to see a simple option to add via points between the start and destination of the route (travelling from A over B to C). A function as it is usually available in car navigation systems, for instance.

Please have a look at the attached screenshots, which I modified a little to resemble the idea. On the second picture you see an altered "navigation-status"-screen, which shows a function that would let you insert a via location in an already running navigation.

Hope you'll find this as useful as I do.

Regards

L. J.

P.S.: I am aware of the method of adding a via location by dragging the middle-point of the connection between start and end when creating a track. That is just not as convenient when you want to navigate to a location by searching or selecting the adress (point / POI) and feel the need to travel via a gas station or the like.