diff --git a/MainWindow/DuplicateMerger/DuplicateMerger.cpp b/MainWindow/DuplicateMerger/DuplicateMerger.cpp
index 06b21d9c..65337553 100644
--- a/MainWindow/DuplicateMerger/DuplicateMerger.cpp
+++ b/MainWindow/DuplicateMerger/DuplicateMerger.cpp
@@ -1,208 +1,208 @@
 /* Copyright 2012-2020 The KPhotoAlbum Development Team
 
    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) version 3 or any later version
    accepted by the membership of KDE e.V. (or its successor approved
    by the membership of KDE e.V.), which shall act as a proxy
    defined in Section 14 of version 3 of the license.
 
    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, see <http://www.gnu.org/licenses/>.
 */
 
 #include "DuplicateMerger.h"
 
 #include "DuplicateMatch.h"
 #include "MergeToolTip.h"
 
 #include <DB/FileName.h>
 #include <DB/FileNameList.h>
 #include <DB/ImageDB.h>
 #include <DB/ImageInfo.h>
 #include <DB/MD5.h>
 #include <Utilities/DeleteFiles.h>
 #include <Utilities/ShowBusyCursor.h>
 
 #include <KLocalizedString>
 #include <QDebug>
 #include <QDialogButtonBox>
 #include <QLabel>
 #include <QPushButton>
 #include <QRadioButton>
 #include <QScrollArea>
 #include <QVBoxLayout>
 
 namespace MainWindow
 {
 
 DuplicateMerger::DuplicateMerger(QWidget *parent)
     : QDialog(parent)
 {
     setAttribute(Qt::WA_DeleteOnClose);
     resize(800, 600);
 
     QWidget *top = new QWidget(this);
     QVBoxLayout *topLayout = new QVBoxLayout(top);
     setLayout(topLayout);
     topLayout->addWidget(top);
 
     QString txt = i18n("<p>Below is a list of all images that are duplicate in your database.<br/>"
                        "Select which you want merged, and which of the duplicates should be kept.<br/>"
                        "The tag and description from the deleted images will be transferred to the kept image</p>");
     QLabel *label = new QLabel(txt);
     QFont fnt = font();
     fnt.setPixelSize(18);
     label->setFont(fnt);
     topLayout->addWidget(label);
 
     m_trash = new QRadioButton(i18n("Move to &trash"));
     m_deleteFromDisk = new QRadioButton(i18n("&Delete from disk"));
     QRadioButton *blockFromDB = new QRadioButton(i18n("&Block from database"));
     m_trash->setChecked(true);
 
     topLayout->addSpacing(10);
     topLayout->addWidget(m_trash);
     topLayout->addWidget(m_deleteFromDisk);
     topLayout->addWidget(blockFromDB);
     topLayout->addSpacing(10);
 
     QScrollArea *scrollArea = new QScrollArea;
     topLayout->addWidget(scrollArea);
     scrollArea->setWidgetResizable(true);
 
     m_container = new QWidget(scrollArea);
     m_scrollLayout = new QVBoxLayout(m_container);
     scrollArea->setWidget(m_container);
 
     m_selectionCount = new QLabel;
     topLayout->addWidget(m_selectionCount);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox();
 
     m_selectAllButton = buttonBox->addButton(i18n("Select &All"), QDialogButtonBox::YesRole);
     m_selectNoneButton = buttonBox->addButton(i18n("Select &None"), QDialogButtonBox::NoRole);
     m_okButton = buttonBox->addButton(QDialogButtonBox::Ok);
     m_cancelButton = buttonBox->addButton(QDialogButtonBox::Cancel);
 
-    connect(m_selectAllButton, &QPushButton::clicked, this, QOverload<bool>::of(&DuplicateMerger::selectAll));
+    connect(m_selectAllButton, &QPushButton::clicked, this, QOverload<>::of(&DuplicateMerger::selectAll));
     connect(m_selectNoneButton, &QPushButton::clicked, this, &DuplicateMerger::selectNone);
     connect(m_okButton, &QPushButton::clicked, this, &DuplicateMerger::go);
     connect(m_cancelButton, &QPushButton::clicked, this, &DuplicateMerger::reject);
 
     topLayout->addWidget(buttonBox);
 
     findDuplicates();
 }
 
 MainWindow::DuplicateMerger::~DuplicateMerger()
 {
     MergeToolTip::destroy();
 }
 
 void DuplicateMerger::selectAll()
 {
     selectAll(true);
 }
 
 void DuplicateMerger::selectNone()
 {
     selectAll(false);
 }
 
 void DuplicateMerger::go()
 {
     Utilities::DeleteMethod method = Utilities::BlockFromDatabase;
 
     if (m_trash->isChecked()) {
         method = Utilities::MoveToTrash;
     } else if (m_deleteFromDisk->isChecked()) {
         method = Utilities::DeleteFromDisk;
     }
 
     for (DuplicateMatch *selector : qAsConst(m_selectors)) {
         selector->execute(method);
     }
 
     accept();
 }
 
 void DuplicateMerger::updateSelectionCount()
 {
     int total = 0;
     int selected = 0;
 
     for (const DuplicateMatch *selector : qAsConst(m_selectors)) {
         ++total;
         if (selector->selected())
             ++selected;
     }
 
     m_selectionCount->setText(i18n("%1 of %2 selected", selected, total));
     m_okButton->setEnabled(selected > 0);
 }
 
 void DuplicateMerger::findDuplicates()
 {
     Utilities::ShowBusyCursor dummy;
 
     const auto images = DB::ImageDB::instance()->images();
     for (const DB::FileName &fileName : images) {
         const DB::ImageInfoPtr info = DB::ImageDB::instance()->info(fileName);
         const DB::MD5 md5 = info->MD5Sum();
         m_matches[md5].append(fileName);
     }
 
     bool anyFound = false;
     for (QMap<DB::MD5, DB::FileNameList>::const_iterator it = m_matches.constBegin();
          it != m_matches.constEnd(); ++it) {
         if (it.value().count() > 1) {
             addRow(it.key());
             anyFound = true;
         }
     }
 
     if (!anyFound) {
         tellThatNoDuplicatesWereFound();
     }
 
     updateSelectionCount();
 }
 
 void DuplicateMerger::addRow(const DB::MD5 &md5)
 {
     DuplicateMatch *match = new DuplicateMatch(m_matches[md5]);
     connect(match, &DuplicateMatch::selectionChanged, this, &DuplicateMerger::updateSelectionCount);
     m_scrollLayout->addWidget(match);
     m_selectors.append(match);
 }
 
 void DuplicateMerger::selectAll(bool b)
 {
     for (DuplicateMatch *selector : qAsConst(m_selectors)) {
         selector->setSelected(b);
     }
 }
 
 void DuplicateMerger::tellThatNoDuplicatesWereFound()
 {
     QLabel *label = new QLabel(i18n("No duplicates found"));
     QFont fnt = font();
     fnt.setPixelSize(30);
     label->setFont(fnt);
     m_scrollLayout->addWidget(label);
 
     m_selectAllButton->setEnabled(false);
     m_selectNoneButton->setEnabled(false);
     m_okButton->setEnabled(false);
 }
 
 } // namespace MainWindow
 
 // vi:expandtab:tabstop=4 shiftwidth=4: