issue: LEAP 42.1, latest updates installed, running GNOME and there a Windows 7
VM on virtualbox (the version coming with LEAP 42.1). What happens now is that
GNOME every now and then is taking the focus, means, mouse clicks and keyboard
go nowhere. Example: pressing ALT+F4 does not close the active application
window on Windows 7, but showing a popup to shutdown the virtual machine.

This only happens on GNOME, running Windows 7 on virtualbox on KDE did not show
this issue in the last 6 weeks I was using it.

expected result: GNOME not taking focus