GCMemcardManager: Add GUI to create new memory card.

Source/Core/DolphinQt/GCMemcardCreateNewDialog.h

@@ -0,0 +1,28 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QDialog>
+
+class QComboBox;
+class QRadioButton;
+
+class GCMemcardCreateNewDialog : public QDialog
+{
+  Q_OBJECT
+public:
+  explicit GCMemcardCreateNewDialog(QWidget* parent = nullptr);
+  ~GCMemcardCreateNewDialog();
+
+  std::string GetMemoryCardPath() const;
+
+private:
+  bool CreateCard();
+
+  QComboBox* m_combobox_size;
+  QRadioButton* m_radio_western;
+  QRadioButton* m_radio_shiftjis;
+  std::string m_card_path;
+};