Hide some of kwin kcm on mobile
Summary:
- Window decorations, useless, since we use maximized and borderless windows
- Virtual Desktop, odd concept to be useful on mobile
- KWin Effects, doesn't have much of usecase on mobile
Reviewers: nicolasfella, davidedmundson
Reviewed By: davidedmundson
Subscribers: kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D22336