Hello,
people, who use current kf5 stuff and want to modify special window settings for selected application run into this bug: https://forum.manjaro.org/index.php?topic=23264.0
There is a workaround for that, thanks to @Orbmiser from Netrunner forum:
http://forums.netrunner.com/showthread.php?tid=17392&pid=28259#pid28259
Kind regards,
Holger