AdvancedPane: Add a button to restore default settings

Source/Core/DolphinQt/Settings/AdvancedPane.h

@@ -3,8 +3,7 @@
 
 #pragma once
 
-#include <vector>
-
+#include <QPushButton>
 #include <QWidget>
 
 class ConfigBool;
@@ -34,6 +33,8 @@ private:
   void ConnectLayout();
   void Update();
 
+  void OnResetButtonClicked();
+
   QComboBox* m_cpu_emulation_engine_combobox;
   ConfigBool* m_enable_mmu_checkbox;
   ConfigBool* m_pause_on_panic_checkbox;
@@ -54,4 +55,6 @@ private:
   QLabel* m_mem1_label;
   ConfigSliderU32* m_mem2_override_slider;
   QLabel* m_mem2_label;
+
+  QPushButton* m_reset_button;
 };