Rename ExitConfirmOverlay to be more explicit about purpose

osu.Game.Tests/Visual/UserInterface/TestSceneHoldToConfirmOverlay.cs

@@ -27,7 +27,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                 Alpha = 0,
             };
 
-            var overlay = new TestHoldToConfirmOverlay
+            var overlay = new TestHoldToExitGameOverlay
             {
                 Action = () =>
                 {
@@ -59,7 +59,7 @@ namespace osu.Game.Tests.Visual.UserInterface
             AddUntilStep("wait until fired again", () => overlay.Fired);
         }
 
-        private partial class TestHoldToConfirmOverlay : ExitConfirmOverlay
+        private partial class TestHoldToExitGameOverlay : HoldToExitGameOverlay
         {
             public void Begin() => BeginConfirm();
         }

osu.Game/Screens/Menu/HoldToExitGameOverlay.cs

@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
 using osu.Game.Input.Bindings;
@@ -10,13 +8,13 @@ using osu.Game.Overlays;
 
 namespace osu.Game.Screens.Menu
 {
-    public partial class ExitConfirmOverlay : HoldToConfirmOverlay, IKeyBindingHandler<GlobalAction>
+    public partial class HoldToExitGameOverlay : HoldToConfirmOverlay, IKeyBindingHandler<GlobalAction>
     {
         protected override bool AllowMultipleFires => true;
 
         public void Abort() => AbortConfirm();
 
-        public ExitConfirmOverlay()
+        public HoldToExitGameOverlay()
             : base(0.7f)
         {
         }

osu.Game/Screens/Menu/MainMenu.cs

@@ -75,7 +75,7 @@ namespace osu.Game.Screens.Menu
         private Bindable<double> holdDelay;
         private Bindable<bool> loginDisplayed;
 
-        private ExitConfirmOverlay exitConfirmOverlay;
+        private HoldToExitGameOverlay holdToExitGameOverlay;
 
         private bool exitConfirmedViaDialog;
         private bool exitConfirmedViaHoldOrClick;
@@ -91,7 +91,7 @@ namespace osu.Game.Screens.Menu
 
             if (host.CanExit)
             {
-                AddInternal(exitConfirmOverlay = new ExitConfirmOverlay
+                AddInternal(holdToExitGameOverlay = new HoldToExitGameOverlay
                 {
                     Action = () =>
                     {
@@ -133,7 +133,7 @@ namespace osu.Game.Screens.Menu
                     Origin = Anchor.TopRight,
                     Margin = new MarginPadding { Right = 15, Top = 5 }
                 },
-                exitConfirmOverlay?.CreateProxy() ?? Empty()
+                holdToExitGameOverlay?.CreateProxy() ?? Empty()
             });
 
             Buttons.StateChanged += state =>
@@ -305,7 +305,7 @@ namespace osu.Game.Screens.Menu
                         this.Exit();
                     }, () =>
                     {
-                        exitConfirmOverlay.Abort();
+                        holdToExitGameOverlay.Abort();
                     }));
                 }