Moved ExportDialog from heap to stack

exportplugin.cpp

@@ -32,7 +32,9 @@ ExportPlugin::ExportPlugin(QObject *parent) :
 
 void ExportPlugin::attachTo(MainWindow &mainWindow)
 {
-    auto dialog = new ExportDialog(mainWindow);
     mainWindow.menuTools()->addAction(QIcon(QStringLiteral(":/zeiterfassung/plugins/exportplugin/images/export-plugin.png")),
-                                      tr("Export"), dialog, &QDialog::open);
+                                      tr("Export"), &mainWindow, [&mainWindow](){
+        ExportDialog dialog(mainWindow);
+        dialog.exec();
+    });
 }