Turn the Metrics widget into a QTabWidget and add a tab logging
all changed signals of QScreen.
This is useful when for example debugging issues with lock screens and
laptop hibernation.
Task-number: QTBUG-79248
Task-number: QTBUG-76902
Change-Id: Ie86789fe1514cb3333a5f3def7f613f217fa6802
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>