[LDCad] Make 572c01 flexible

[Philippe Hurbain]

Custom version of the 572c donor part, perhaps?

I supposed that, but couldn't find anything wrong, except that file type was wrongly set to shortcut. I corrected, and updated the part in standard Studio library (two times, in official AND unofficial parts!). Nothing changed

Other than that, I see have a little more to learn about how LDCad uses groups in path parts. :-)

Yes, that's something Roland explained to me recently. Very useful here...