feat: added show performance overlay preference (#1209)

app/streaming/session.cpp

@@ -1821,6 +1821,9 @@ void Session::execInternal()
     // Start rich presence to indicate we're in game
     RichPresenceManager presence(*m_Preferences, m_App.name);
 
+    // Toggle the stats overlay if requested by the user
+    m_OverlayManager.setOverlayState(Overlay::OverlayDebug, m_Preferences->showPerformanceOverlay);
+
     // Hijack this thread to be the SDL main thread. We have to do this
     // because we want to suspend all Qt processing until the stream is over.
     SDL_Event event;