Add cheats in per game configuration (#6379)

src/citra_qt/configuration/configure_per_game.h

@@ -19,6 +19,7 @@ class ConfigureEnhancements;
 class ConfigureGraphics;
 class ConfigureSystem;
 class ConfigureDebug;
+class ConfigureCheats;
 
 class QGraphicsScene;
 class QStandardItem;
@@ -51,6 +52,7 @@ public:
 private:
     void changeEvent(QEvent* event) override;
     void RetranslateUI();
+    void HandleAcceptedEvent();
 
     void HandleApplyButtonClicked();
 
@@ -70,4 +72,5 @@ private:
     std::unique_ptr<ConfigureGraphics> graphics_tab;
     std::unique_ptr<ConfigureSystem> system_tab;
     std::unique_ptr<ConfigureDebug> debug_tab;
+    std::unique_ptr<ConfigureCheats> cheat_tab;
 };