QFileSelector ignores default Locale

The current implementation of the QFileSelector's QFileSelectorPrivate::updateSelector() function only considers the system locale and not the default locale which in many other cases is used instead because if can be changed by using QLocale::setDefault() and falls back to the system locale if not set.

Please consider the following adjustment:

// Original version
sharedData->staticSelectors << QLocale::system().name();

// Proposed version
sharedData->staticSelectors << QLocale().name();