D8444: Define default Action when we plug unknown monitor

[Laurent Montel]

mlaurent edited the test plan for this revision.

REPOSITORY
  R104 KScreen

REVISION DETAIL
  https://phabricator.kde.org/D8444

To: mlaurent, davidedmundson
Cc: graesslin, dvratil, davidedmundson, ngraham, plasma-devel, ZrenBot, 
progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart