Report windowing system
Summary:
Sometimes applications or Plasma have different code paths for X11 or Wayland.
Drkonqi reporting that saves one "question -> wait for reply -> period until reply
is seen"-cycle.
Test Plan: Try it in test mode
Reviewers: sitter
Reviewed By: sitter
Subscribers: apol, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D24890