Disable Freelook in hardcore mode

The player getting a better view of their surroundings than the game would normally allow could possibly give the player an advantage over the original hardware, so Freelook is disabled in hardcore mode. To do this, I disable the config flag for Freelook when it is accessed, to make sure that it is disabled whether it was enabled before or after hardcore mode was enabled.

Source/Core/DolphinQt/MainWindow.cpp

@@ -1244,6 +1244,11 @@ void MainWindow::ShowFreeLookWindow()
   {
     m_freelook_window = new FreeLookWindow(this);
     InstallHotkeyFilter(m_freelook_window);
+
+#ifdef USE_RETRO_ACHIEVEMENTS
+    connect(m_freelook_window, &FreeLookWindow::OpenAchievementSettings, this,
+            &MainWindow::ShowAchievementSettings);
+#endif  // USE_RETRO_ACHIEVEMENTS
   }
 
   SetQWidgetWindowDecorations(m_freelook_window);