Use native dialogs

mainwindow.cpp

@@ -316,7 +316,7 @@ void MainWindow::copyOrMove(bool copy)
     QString dest = QFileDialog::getExistingDirectory(this,
                                                      tr("Select destination"),
                                                      _lastDir,
-                                                     QFileDialog::ShowDirsOnly | QFileDialog::DontUseNativeDialog);
+                                                     QFileDialog::ShowDirsOnly);
     copyOrMove(copy, dest);
 }
 
@@ -401,9 +401,7 @@ void MainWindow::loadFile()
     QString file = QFileDialog::getOpenFileName(this,
                                                 tr("Open file"),
                                                 _lastDir,
-                                                _openFilter,
+                                                _openFilter);
-                                                nullptr,
-                                                QFileDialog::DontUseNativeDialog);
     loadFile(file);
 }
 
@@ -430,7 +428,7 @@ void MainWindow::loadFile(int row)
 
 void MainWindow::indexDir()
 {
-    QString dir = QFileDialog::getExistingDirectory(this, tr("Index directory"), _lastDir, QFileDialog::ShowDirsOnly | QFileDialog::DontUseNativeDialog);
+    QString dir = QFileDialog::getExistingDirectory(this, tr("Index directory"), _lastDir, QFileDialog::ShowDirsOnly);
     indexDir(dir);
 }