Add classic hotkey support for blinds / traceable (#37023)

RFC. Not sure others will like this.

osu.Game.Rulesets.Osu/Mods/OsuModBlinds.cs

@@ -21,7 +21,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public partial class OsuModBlinds : Mod, IApplicableToDrawableRuleset<OsuHitObject>, IApplicableToHealthProcessor
+    public partial class OsuModBlinds : ModBlinds, IApplicableToDrawableRuleset<OsuHitObject>, IApplicableToHealthProcessor
     {
         public override string Name => "Blinds";
         public override LocalisableString Description => "Play with blinds on your screen.";

osu.Game.Rulesets.Osu/Mods/OsuModTraceable.cs

@@ -16,7 +16,7 @@ using osu.Game.Rulesets.Osu.Skinning.Default;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public class OsuModTraceable : ModWithVisibilityAdjustment, IRequiresApproachCircles
+    public class OsuModTraceable : ModTraceable, IRequiresApproachCircles
     {
         public override string Name => "Traceable";
         public override string Acronym => "TC";

osu.Game/Overlays/Mods/Input/ClassicModHotkeyHandler.cs

@@ -24,8 +24,8 @@ namespace osu.Game.Overlays.Mods.Input
             [Key.A] = new[] { typeof(ModHardRock) },
             [Key.S] = new[] { typeof(ModSuddenDeath), typeof(ModPerfect) },
             [Key.D] = new[] { typeof(ModDoubleTime), typeof(ModNightcore) },
-            [Key.F] = new[] { typeof(ModHidden) },
-            [Key.G] = new[] { typeof(ModFlashlight) },
+            [Key.F] = new[] { typeof(ModHidden), typeof(ModTraceable) },
+            [Key.G] = new[] { typeof(ModFlashlight), typeof(ModBlinds) },
             [Key.Z] = new[] { typeof(ModRelax) },
             [Key.V] = new[] { typeof(ModAutoplay), typeof(ModCinema) }
         };

osu.Game/Rulesets/Mods/ModBlinds.cs

@@ -0,0 +1,10 @@
+// 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.
+
+namespace osu.Game.Rulesets.Mods
+{
+    public abstract class ModBlinds : Mod
+    {
+        // Class only exists for classic hotkey support.
+    }
+}

osu.Game/Rulesets/Mods/ModTraceable.cs

@@ -0,0 +1,10 @@
+// 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.
+
+namespace osu.Game.Rulesets.Mods
+{
+    public abstract class ModTraceable : ModWithVisibilityAdjustment
+    {
+        // Class only exists for classic hotkey support.
+    }
+}