Rewrite property panel to adapt to ruleset config.

Assets/Cryville/Crtr/Config/PVPNumberStepped.cs

@@ -0,0 +1,14 @@
+using System;
+
+namespace Cryville.Crtr.Config {
+	public class PVPNumberStepped : PVPNumberBase {
+		protected override void OnIdle() {
+			SetRatio(0.5f);
+		}
+		protected override double GetValue(double ratio, float deltaTime, double min, double max) {
+			double delta = (ratio > 0.5 ? 1 : -1) * Math.Pow((ratio - 0.5f) * 2, 2) * deltaTime;
+			// if (LogarithmicMode) return Math.Pow(Math.E, Math.Log(m_value) + delta);
+			return Convert.ToDouble(RawValue) + delta;
+		}
+	}
+}