Comment # 4 on bug 982962 from Fabian Vogt

(In reply to Ruediger Meier from comment #3)
> Still not fixed in 42.3.

The best way is to remove all dependencies to plasma-nm5 everywhere and instead
only use a "Supplements: packageand(plasma5-desktop:NetworkManager)" in
plasma-nm5.

As this is not tested by openQA however (only wicked), I'd like to avoid this
change in Leap 15.0 though, which is too close to release.

A workaround is to remove plasma5-session, but copy the session file
(/usr/share/xsessions/plasma5.desktop) beforehand.