Config: Add Edit button to DSU server menu

Signed-off-by: Ethan Uppal <113849268+ethanuppal@users.noreply.github.com>

Source/Core/DolphinQt/Config/ControllerInterface/DualShockUDPClientEditServerDialog.h

@@ -0,0 +1,32 @@
+// Copyright 2020 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+
+#include <QDialog>
+
+class QDialogButtonBox;
+class QGridLayout;
+class QLineEdit;
+class QSpinBox;
+
+class DualShockUDPClientEditServerDialog final : public QDialog
+{
+  Q_OBJECT
+public:
+  explicit DualShockUDPClientEditServerDialog(QWidget* parent,
+                                              std::optional<size_t> existing_index);
+
+private:
+  void CreateWidgets();
+  void OnServerFinished();
+
+  std::optional<size_t> m_existing_index;
+  QDialogButtonBox* m_buttonbox;
+  QGridLayout* m_main_layout;
+  QLineEdit* m_description;
+  QLineEdit* m_server_address;
+  QSpinBox* m_server_port;
+};