Export custom selections of waypoints to any format

[albar965]

Discussed in #1020

^{Originally posted by Tazzzilo April 25, 2023}
I noticed that when you select multiple Waypoints/Airports in your flight plan that you are only able to export them via right click context-menu to .lnmpln format.

You can't choose the format like you are able to do via main menu bar (File -> Export...)

It would be nice to select a number of custom waypoints and export them to every custom format.

Why is this helpful?
If you log every destination in your current flight plan and add the new destinations at the end that you are still able to just create a flight plan file for the new destinations.