Comment # 1 on bug 899104 from Lukas Ocilka

This looks like an improper use of X-KDE-Library entry in desktop files
and I see no reason to use it anyway.

There are 112 occurrences in the code:
https://github.com/search?q=X-KDE-Library+user%3Ayast&ref=searchresults&type=Code&utf8=%E2%9C%93

This is what we mostly have there:

    X-KDE-Library=yast2

Martin, any idea why should we use X-KDE-Library at all?
Josef, this looks like a job for your "change all repos at once" script.