This is an xev-like program. A user clicks a mouse button inside the
Window, and the program displays (a) the "raw" button number; (b)
the corresponding Qt::MouseButton name; and (c) the type of mouse Event.
Task-number: QTBUG-24112
Change-Id: I8a76ff37b5b85639f662706072cc4a2ce490754b
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>
