List both setup and monitor UUIDs in debug

Summary:
I keep having to re-add this patch locally to see which config is
actually in play.

Test Plan: Compiles

Reviewers: Plasma, graesslin

Reviewed By: Plasma, graesslin

Subscribers: plasma-devel, kwin, KWin

Tags: KWin

Differential Revision: https://phabricator.kde.org/D5795