Change case to match; change hotkey to be more globally usable (previous has conflict on macOS)

osu.Game/Input/Bindings/GlobalActionContainer.cs

@@ -50,7 +50,7 @@ namespace osu.Game.Input.Bindings
         {
             new KeyBinding(InputKey.Space, GlobalAction.SkipCutscene),
             new KeyBinding(InputKey.Tilde, GlobalAction.QuickRetry),
-            new KeyBinding(new[] { InputKey.Alt, InputKey.Tilde }, GlobalAction.QuickExit),
+            new KeyBinding(new[] { InputKey.Control, InputKey.Tilde }, GlobalAction.QuickExit),
             new KeyBinding(new[] { InputKey.Control, InputKey.Plus }, GlobalAction.IncreaseScrollSpeed),
             new KeyBinding(new[] { InputKey.Control, InputKey.Minus }, GlobalAction.DecreaseScrollSpeed),
         };
@@ -95,6 +95,9 @@ namespace osu.Game.Input.Bindings
         [Description("Quick retry (hold)")]
         QuickRetry,
 
+        [Description("Quick exit (Hold)")]
+        QuickExit,
+
         [Description("Take screenshot")]
         TakeScreenshot,
 
@@ -112,8 +115,5 @@ namespace osu.Game.Input.Bindings
 
         [Description("Select")]
         Select,
-
-        [Description("Quick Exit (Hold)")]
-        QuickExit,
     }
 }