QT: Made font descriptions in GE a little more specific in case the user has several similar fonts installed.

QT: Fixed GE attribute not closing correctly if dialog window open while deleting the associated object in the main window.

QT: The CoWowListWidget shouldn't close if the user pressed OK/Apply without selecting anything in the list.

QT: Fixed double click. Apparently a double click is not two press events, but its own unique event.

See merge request !1