Fixed camp settings saving. Added about messagebox. Methods IGridForm::handleNewRecord and IGridForm::handleEditRecord are virtual now.

application/mainwindow.cpp

@@ -178,3 +178,13 @@ void MainWindow::on_actionCountry_register_triggered()
     }
 
 }
+
+void MainWindow::on_actionAbout_Qt_triggered()
+{
+    QMessageBox::aboutQt(this);
+}
+
+void MainWindow::on_actionAbout_triggered()
+{
+    QMessageBox::about(this, tr("About prodejna"), tr("Modular cash register software under GPL license.\n(C) 2015 - 2017 Josef Rokos, Zdenek Jonák"));
+}