Thank you LouBouha, thank you BIBUOT for the discussion.
I'm excited! Yes it works I testet it already on my phone.
In my installed version it are the lines 675 to 677.
It is an advantage if the skip button optional appears earlier and longer is available. You don't have to push it in case you would like to visit the waypoint exactly. One rather theoretical thing to keep in mind, if the overnext waypoint is within that selected range too a little conflict could be generated by pushing the button twice.

Best regard