added enabling logic for hermite spline

    QTableWidget *table = m_ui->positionAprioriSigmaTable;

    m_ui->positionAprioriSigmaTable->setRowCount(currentIndex);

    // Fitting over hermite spline only available to user when solve option is not NONE

    if (currentIndex == 0) {

      m_ui->hermiteSplineCheckBox->setEnabled(false);

    }

    else {

      m_ui->hermiteSplineCheckBox->setEnabled(true);

    }

    // POSITION

    if (currentIndex > 0) { 

      QTableWidgetItem *coefficient = new QTableWidgetItem();