Move graceful exit to OsuGameBase

osu.Game/OsuGame.cs

@@ -918,18 +918,6 @@ namespace osu.Game
             return base.OnExiting();
         }
 
-        /// <summary>
-        /// Use to programatically exit the game as if the user was triggering via alt-f4.
-        /// Will keep persisting until an exit occurs (exit may be blocked multiple times).
-        /// </summary>
-        public void GracefullyExit()
-        {
-            if (!OnExiting())
-                Exit();
-            else
-                Scheduler.AddDelayed(GracefullyExit, 2000);
-        }
-
         protected override void UpdateAfterChildren()
         {
             base.UpdateAfterChildren();

osu.Game/OsuGameBase.cs

@@ -368,6 +368,18 @@ namespace osu.Game
             LocalConfig ??= new OsuConfigManager(Storage);
         }
 
+        /// <summary>
+        /// Use to programatically exit the game as if the user was triggering via alt-f4.
+        /// Will keep persisting until an exit occurs (exit may be blocked multiple times).
+        /// </summary>
+        public void GracefullyExit()
+        {
+            if (!OnExiting())
+                Exit();
+            else
+                Scheduler.AddDelayed(GracefullyExit, 2000);
+        }
+
         protected override Storage CreateStorage(GameHost host, Storage defaultStorage) => new OsuStorage(host, defaultStorage);
 
         private readonly List<ICanAcceptFiles> fileImporters = new List<ICanAcceptFiles>();