Fix instant pausing when game becomes inactive

Resolves #4685.

osu.Game/Screens/Play/HUD/HoldForMenuButton.cs

@@ -70,6 +70,11 @@ namespace osu.Game.Screens.Play.HUD
             return base.OnMouseMove(e);
         }
 
+        public bool GameInactive
+        {
+            set => button.GameInactive = value;
+        }
+
         protected override void Update()
         {
             base.Update();
@@ -184,6 +189,25 @@ namespace osu.Game.Screens.Play.HUD
                 base.OnHoverLost(e);
             }
 
+            private bool gameInactive;
+
+            public bool GameInactive
+            {
+                get => gameInactive;
+                set
+                {
+                    if (gameInactive == value)
+                        return;
+
+                    gameInactive = value;
+
+                    if (gameInactive)
+                        BeginConfirm();
+                    else
+                        AbortConfirm();
+                }
+            }
+
             public bool OnPressed(GlobalAction action)
             {
                 switch (action)

osu.Game/Screens/Play/Player.cs

@@ -393,8 +393,8 @@ namespace osu.Game.Screens.Play
             base.Update();
 
             // eagerly pause when we lose window focus (if we are locally playing).
-            if (PauseOnFocusLost && !Game.IsActive.Value)
-                Pause();
+            if (PauseOnFocusLost)
+                HUDOverlay.HoldToQuit.GameInactive = !Game.IsActive.Value;
         }
 
         public void Pause()