QDoubleSpinbox behaviour with Russian locale and values > 999.

QDoubleSpinBox don't show the decimal separator (',') for russian locale.

Example :
QSpinBox SpinBox;
SpinBox.setLocale(QLocale(QLocale::Russian, QLocale::RussianFederation));
SpinBox.setValue(1001.5);

This example shows '1 0015' and not '1 000,5' as it should.