klipper: Avoid incorrect wayland roundtrips
Klipper code is full of existing X11 hacks, as clipboard is a complicated problem.
In 923e9bc9 these X11 workarounds were split into another file, but also in that change the existing roundtrip function gained a wayland backend. This doens't help as the reasons we need to roundtrip are platform specific. Trying to generalise makes things harder rather than easier.
(cherry picked from commit da06b136)
Edited by Vlad Zahorodnii