Make 'Save' button in 'Patches' section of 'Cheats and Patches' window close the window when clicked

This addresses one of the issues with using shadPS4 on a Steam Deck, or any desktop and/or interface that hides the titlebar, such as window managers

src/qt_gui/cheats_patches.cpp

@@ -464,6 +464,8 @@ void CheatsPatches::onSaveButtonClicked() {
     } else {
         QMessageBox::information(this, tr("Success"), tr("Options saved successfully."));
     }
+
+    QWidget::close();
 }
 
 QCheckBox* CheatsPatches::findCheckBoxByName(const QString& name) {