diff --git a/src/kdefrontend/datasources/FITSOptionsWidget.cpp b/src/kdefrontend/datasources/FITSOptionsWidget.cpp
index 43e3053d5..96ce6e7b2 100644
--- a/src/kdefrontend/datasources/FITSOptionsWidget.cpp
+++ b/src/kdefrontend/datasources/FITSOptionsWidget.cpp
@@ -1,182 +1,182 @@
 /***************************************************************************
     File                 : FITSOptionsWidget.cpp
     Project              : LabPlot
     Description          : Widget providing options for the import of FITS data
     --------------------------------------------------------------------
     Copyright            : (C) 2016 Fabian Kristof (fkristofszabolcs@gmail.com)
     Copyright            : (C) 2017 Stefan Gerlach (stefan.gerlach@uni.kn)
 
 ***************************************************************************/
 
 /***************************************************************************
 *                                                                         *
 *  This program is free software; you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation; either version 2 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program is distributed in the hope that it will be useful,        *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 *  GNU General Public License for more details.                           *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
 *   Boston, MA  02110-1301  USA                                           *
 *                                                                         *
-************************************************************************** */
+***************************************************************************/
 
 #include "FITSOptionsWidget.h"
 #include "ImportFileWidget.h"
 #include "backend/datasources/filters/FITSFilter.h"
 #include "backend/lib/macros.h"
 
 FITSOptionsWidget::FITSOptionsWidget(QWidget* parent, ImportFileWidget* fileWidget) : QWidget(parent), m_fileWidget(fileWidget) {
 	ui.setupUi(parent);
 
 	ui.twExtensions->headerItem()->setText(0, i18n("Content"));
 	ui.twExtensions->setSelectionMode(QAbstractItemView::SingleSelection);
 	ui.twExtensions->setAlternatingRowColors(true);
 	ui.twExtensions->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
 	ui.twPreview->setEditTriggers(QAbstractItemView::NoEditTriggers);
 
 	ui.bRefreshPreview->setIcon( QIcon::fromTheme("view-refresh") );
 
 	connect(ui.twExtensions, &QTreeWidget::itemSelectionChanged, this, &FITSOptionsWidget::fitsTreeWidgetSelectionChanged);
 	connect(ui.bRefreshPreview, &QPushButton::clicked, fileWidget, &ImportFileWidget::refreshPreview);
 }
 
 void FITSOptionsWidget::clear() {
 	ui.twExtensions->clear();
 	ui.twPreview->clear();
 }
 
 QString FITSOptionsWidget::currentExtensionName() {
 	QString name;
 
 	if (ui.twExtensions->currentItem() != nullptr && ui.twExtensions->currentItem()->text(0) != i18n("Primary header"))
 		name = ui.twExtensions->currentItem()->text(ui.twExtensions->currentColumn());
 
 	return name;
 }
 
 void FITSOptionsWidget::updateContent(FITSFilter* filter, const QString& fileName) {
 	DEBUG("FITSOptionsWidget::updateContent() file name = " << fileName.toStdString());
 	ui.twExtensions->clear();
 	filter->parseExtensions(fileName, ui.twExtensions, true);
 	DEBUG("FITSOptionsWidget::updateContent() DONE");
 }
 
 /*!
 	updates the selected var name of a NetCDF file when the tree widget item is selected
 */
 //TODO
 void FITSOptionsWidget::fitsTreeWidgetSelectionChanged() {
 	DEBUG("fitsTreeWidgetSelectionChanges()");
 	QDEBUG("SELECTED ITEMS =" << ui.twExtensions->selectedItems());
 
 	if (ui.twExtensions->selectedItems().isEmpty())
 		return;
 
 	QTreeWidgetItem* item = ui.twExtensions->selectedItems().first();
 	int column = ui.twExtensions->currentColumn();
 
 	WAIT_CURSOR;
 	const QString& itemText = item->text(column);
 	QString selectedExtension;
 	int extType = 0;
 	if (itemText.contains(QLatin1String("IMAGE #")) ||
 	        itemText.contains(QLatin1String("ASCII_TBL #")) ||
 	        itemText.contains(QLatin1String("BINARY_TBL #")))
 		extType = 1;
 	else if (!itemText.compare(i18n("Primary header")))
 		extType = 2;
 	if (extType == 0) {
 		if (item->parent() != nullptr) {
 			if (item->parent()->parent() != nullptr)
 				selectedExtension = item->parent()->parent()->text(0) + QLatin1String("[") + item->text(column) + QLatin1String("]");
 		}
 	} else if (extType == 1) {
 		if (item->parent() != nullptr) {
 			if (item->parent()->parent() != nullptr) {
 				bool ok;
 				int hduNum = itemText.rightRef(1).toInt(&ok);
 				selectedExtension = item->parent()->parent()->text(0) + QLatin1String("[") + QString::number(hduNum-1) + QLatin1String("]");
 			}
 		}
 	} else {
 		if (item->parent()->parent() != nullptr)
 			selectedExtension = item->parent()->parent()->text(column);
 	}
 
 	if (!selectedExtension.isEmpty()) {
 		auto filter = static_cast<FITSFilter*>(m_fileWidget->currentFileFilter());
 		bool readFitsTableToMatrix;
 		const QVector<QStringList> importedStrings = filter->readChdu(selectedExtension, &readFitsTableToMatrix, ui.sbPreviewLines->value());
 		emit m_fileWidget->checkedFitsTableToMatrix(readFitsTableToMatrix);
 
 		const int rows = importedStrings.size();
 		ui.twPreview->clear();
 
 		ui.twPreview->setRowCount(rows);
 		int colCount = 0;
 		const int maxColumns = 300;
 		for (int i = 0; i < rows; ++i) {
 			QStringList lineString = importedStrings[i];
 			if (i == 0) {
 				colCount = lineString.size() > maxColumns ? maxColumns : lineString.size();
 				ui.twPreview->setColumnCount(colCount);
 			}
 			colCount = lineString.size() > maxColumns ? maxColumns : lineString.size();
 
 			for (int j = 0; j < colCount; ++j) {
 				auto* item = new QTableWidgetItem(lineString[j]);
 				ui.twPreview->setItem(i, j, item);
 			}
 		}
 		ui.twPreview->resizeColumnsToContents();
 	}
 	RESET_CURSOR;
 }
 
 /*!
 	return list of selected FITS extension names
 */
 const QStringList FITSOptionsWidget::selectedExtensions() const {
 	QStringList names;
 	for (const auto* item : ui.twExtensions->selectedItems())
 		names << item->text(0);
 
 	return names;
 }
 
 const QString FITSOptionsWidget::extensionName(bool* ok) {
 	if (ui.twExtensions->currentItem() != nullptr) {
 		const QTreeWidgetItem* item = ui.twExtensions->currentItem();
 		const int currentColumn = ui.twExtensions->currentColumn();
 		QString itemText = item->text(currentColumn);
 		int extType = 0;
 		if (itemText.contains(QLatin1String("IMAGE #")) ||
 		        itemText.contains(QLatin1String("ASCII_TBL #")) ||
 		        itemText.contains(QLatin1String("BINARY_TBL #")))
 			extType = 1;
 		else if (!itemText.compare(i18n("Primary header")))
 			extType = 2;
 
 		if (extType == 0) {
 			if (item->parent() != nullptr && item->parent()->parent() != nullptr)
 				return item->parent()->parent()->text(0) + QLatin1String("[")+ item->text(currentColumn) + QLatin1String("]");
 		} else if (extType == 1) {
 			if (item->parent() != nullptr && item->parent()->parent() != nullptr) {
 				int hduNum = itemText.rightRef(1).toInt(ok);
 				return item->parent()->parent()->text(0) + QLatin1String("[") + QString::number(hduNum-1) + QLatin1String("]");
 			}
 		} else {
 			if (item->parent()->parent() != nullptr)
 				return item->parent()->parent()->text(currentColumn);
 		}
 	}
 
 	return QString();
 }