Qt/Config: Move BalloonTip.h/cpp from Graphics to ToolTipControls

BalloonTip.h/cpp are only used from the ToolTipControls folder, so move
them there.

Source/Core/DolphinQt/Config/ToolTipControls/BalloonTip.h

@@ -0,0 +1,41 @@
+// Copyright 2020 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <QIcon>
+#include <QPixmap>
+#include <QWidget>
+
+class BalloonTip : public QWidget
+{
+  Q_OBJECT
+
+  struct PrivateTag
+  {
+  };
+
+public:
+  enum class ShowArrow
+  {
+    Yes,
+    No
+  };
+  static void ShowBalloon(const QIcon& icon, const QString& title, const QString& msg,
+                          const QPoint& pos, QWidget* parent,
+                          ShowArrow show_arrow = ShowArrow::Yes);
+  static void HideBalloon();
+
+  BalloonTip(PrivateTag, const QIcon& icon, QString title, QString msg, QWidget* parent);
+
+private:
+  void UpdateBoundsAndRedraw(const QPoint&, ShowArrow);
+
+protected:
+  void paintEvent(QPaintEvent*) override;
+
+private:
+  QColor m_border_color;
+  QPixmap m_pixmap;
+  bool m_show_arrow = true;
+};