qt_gui: Refreshing game list after install directory change

The game list wasn't being refreshed automaticly after a manual directory change on the QT GUI,  now the RefreshGameTable will be called after the GameInstallDialog is executed.

src/qt_gui/main_window.cpp

@@ -577,6 +577,7 @@ void MainWindow::InstallDragDropPkg(std::filesystem::path file, int pkgNum, int
 void MainWindow::InstallDirectory() {
     GameInstallDialog dlg;
     dlg.exec();
+    RefreshGameTable();
 }
 
 void MainWindow::SetLastUsedTheme() {