Qt: Implement Cheats Manager

Source/Core/DolphinQt2/Config/CheatWarningWidget.h

@@ -15,7 +15,7 @@ class CheatWarningWidget : public QWidget
 {
   Q_OBJECT
 public:
-  explicit CheatWarningWidget(const std::string& game_id);
+  explicit CheatWarningWidget(const std::string& game_id, bool restart_required);
 
 signals:
   void OpenCheatEnableSettings();
@@ -29,4 +29,5 @@ private:
   QLabel* m_text;
   QPushButton* m_config_button;
   const std::string m_game_id;
+  bool m_restart_required;
 };