Fix ruleset skins incorrectly providing configuration defaults

osu.Game/Skinning/DefaultSkinConfiguration.cs

@@ -0,0 +1,28 @@
+// 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.
+
+using osuTK.Graphics;
+
+namespace osu.Game.Skinning
+{
+    /// <summary>
+    /// A skin configuration pre-populated with sane defaults.
+    /// </summary>
+    public class DefaultSkinConfiguration : SkinConfiguration
+    {
+        public DefaultSkinConfiguration()
+        {
+            HitCircleFont = "default";
+
+            ComboColours.AddRange(new[]
+            {
+                new Color4(17, 136, 170, 255),
+                new Color4(102, 136, 0, 255),
+                new Color4(204, 102, 0, 255),
+                new Color4(121, 9, 13, 255)
+            });
+
+            CursorExpand = true;
+        }
+    }
+}