Changed the tranlsation context of the "Details" text on the button to
QObject. This allows applications linking to this library to export the
"Details" string within the QObject context using lupdate. This can be
done using the following code:

QT_TRANSLATE_NOOP("QObject","Details")

The "Details" text will correctly appear in the application's .ts files
produced by lupdate and the text will be translated using the
application's .ts files instead of having to create a .ts file for the
QtCreatorLib library.