Qt: Fix missing borders in separate render window

Regression from f07b726c67

src/duckstation-qt/mainwindow.cpp

@@ -263,8 +263,8 @@ std::optional<WindowInfo> MainWindow::acquireRenderWindow(RenderAPI render_api,
     }
     else
     {
-      restoreDisplayWindowGeometryFromConfig();
       container->showNormal();
+      restoreDisplayWindowGeometryFromConfig();
     }
 
 // See note below.