some errors in KML files can prevent KML control from working

[joernu76]

If a NaN is in the coordinates, the KML parsing crashes. If the file is in the "default-list-of-files", this prevents the KML control from opening until the local-settings in the .config folder is deleted.

[ReimarBauer]

please check if an xmllint which is in our environment solves this

[ReimarBauer]

when this gets merged we need to pin the old version and have to implement this in the next major
conda-forge/fastkml-feedstock#11

[ReimarBauer]

Is this the same problem as #2664