Qt/PropertiesDialog: Implement "Patches" tab

Source/Core/DolphinQt2/Config/PatchesWidget.h

@@ -0,0 +1,45 @@
+// Copyright 2018 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <QWidget>
+
+#include "Core/PatchEngine.h"
+#include "DolphinQt2/GameList/GameFile.h"
+
+class QListWidget;
+class QListWidgetItem;
+class QPushButton;
+
+class PatchesWidget : public QWidget
+{
+public:
+  explicit PatchesWidget(const GameFile& game);
+
+private:
+  void CreateWidgets();
+  void ConnectWidgets();
+  void SavePatches();
+  void Update();
+  void UpdateActions();
+
+  void OnItemChanged(QListWidgetItem*);
+  void OnAdd();
+  void OnRemove();
+  void OnEdit();
+
+  QListWidget* m_list;
+  QPushButton* m_add_button;
+  QPushButton* m_edit_button;
+  QPushButton* m_remove_button;
+
+  std::vector<PatchEngine::Patch> m_patches;
+  const GameFile& m_game;
+  std::string m_game_id;
+  u16 m_game_revision;
+};