add doc to JigsawSetupDialog::on_positionComboBox_currentIndexChanged()

  }

  /**

   * Slot that listens for when the Instrument Position Solve Option combobox changes.

   *

   * This slot updates the value of the SPK Solve Degree spin box according to which solve position

   * option is selected. This slot also disables the SPK Solve Degree spin box whenever a solve

   * position that is not ALL is selected.

   *

   * @param const QString & Reference to the value that the pointing option combobox was changed to.

   */

  void JigsawSetupDialog::on_positionComboBox_currentIndexChanged(const QString &arg1) {

    int currentIndex = m_ui->positionComboBox->currentIndex();

    QSpinBox *spinBox = m_ui->spkSolveDegreeSpinBox;