Pull down scroll velocity option. Add property categories for ruleset config.

Assets/Cryville/Crtr/Config/RulesetConfig.cs

@@ -1,12 +1,26 @@
-using Newtonsoft.Json;
+using Cryville.Common.ComponentModel;
+using Newtonsoft.Json;
+using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 
 namespace Cryville.Crtr.Config {
 	public class RulesetConfig {
 		public Generic generic = new Generic();
 		public class Generic {
+			[Category("basic")]
 			[JsonProperty("skin")]
 			public string Skin { get; set; }
+
+			[Category("deprecated")][Obsolete]
+			[JsonProperty("scroll_velocity")][DefaultValue(1)]
+			[LogarithmicScale][Step(0.5f)][Precision(1e-1)]
+			public float ScrollVelocity { get; set; }
+
+			public Generic() {
+				Skin = "";
+				ScrollVelocity = 1;
+			}
 		}
 		public Dictionary<string, InputEntry> inputs
 			= new Dictionary<string, InputEntry>();