Qt 5 to-do in QLocale

// ### Qt 5: We need to return QString from these function since
//           unicode data contains several characters for these fields.
    QChar decimalPoint() const;
    QChar groupSeparator() const;
    QChar percent() const;
    QChar zeroDigit() const;
    QChar negativeSign() const;
    QChar positiveSign() const;
    QChar exponential() const;