GUI: give the SelectFilesDialog a parent widget

gui/mainwindow.cpp

@@ -350,8 +350,8 @@ QStringList MainWindow::SelectFilesToCheck(QFileDialog::FileMode mode)
     // QFileDialog::getExistingDirectory() because they show native Windows
     // selection dialog which is a lot more usable than QT:s own dialog.
     if (mode == QFileDialog::ExistingFiles) {
-        SelectFilesDialog *dialog = new SelectFilesDialog;
-        dialog->exec();
+        SelectFilesDialog dialog(this);
+        dialog.exec();
         /*
                 selected = QFileDialog::getOpenFileNames(this,
                            tr("Select files to check"),

gui/selectfilesdialog.cpp

@@ -103,7 +103,7 @@ public:
 
 
 
-SelectFilesDialog::SelectFilesDialog() : QDialog()
+SelectFilesDialog::SelectFilesDialog(QWidget *w) : QDialog(w)
 {
     setModal(true);
 

gui/selectfilesdialog.h

@@ -6,7 +6,7 @@
 
 class SelectFilesDialog : public QDialog {
 public:
-    SelectFilesDialog();
+    SelectFilesDialog(QWidget *w);
 };
 
 #endif