Added replacement method for Game.UI.InventoryPanelScrollEngine:ScrollPanelByMouseWheel to improve scroll wheel speed.

CLre/Fixes/InventoryPanelScrollEngineFix.cs

@@ -0,0 +1,39 @@
+using System;
+
+using HarmonyLib;
+using System.Reflection;
+using UnityEngine;
+
+namespace CLre.Fixes
+{
+       [Bugfix(name = "ScrollSpeedImprovement",
+       description = "Improve mouse wheel scroll speed in inventory",
+       more = "https://trello.com/c/elL8IVdn/4-scroll-menus-are-insensitive",
+       component = BugfixType.HarmonyPatch, id = 4)]
+        [HarmonyPatch]
+        class InventoryPanelScrollEngine_ScrollPanelByMouseWheel_Patch
+    {
+            [HarmonyPrefix]
+            public static bool BeforeMethodCall(ref object panelScrollComponent, ref float scrollValue)
+            {
+            if (panelScrollComponent == null) return true; // If it's null, we don't try to handle it.
+            // We, perhaps dangerously, assume that we'll only get a panelScrollComponent.
+            PropertyInfo scrollbar = panelScrollComponent.GetType().GetProperty("scrollbar", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
+            UnityEngine.UI.Scrollbar sb = scrollbar.GetValue(panelScrollComponent) as UnityEngine.UI.Scrollbar;
+            float num = -scrollValue * (sb.size * 0.3f);
+            float num2 = sb.value;
+            num2 = Mathf.Clamp01(num2 + num);
+            sb.value = num2;
+            return false;   // Tell harmony not to invoke the original method
+        }
+
+
+        [HarmonyTargetMethod]
+            public static MethodBase Target()
+            {
+                MethodInfo methodtopatch = AccessTools.Method("Game.UI.InventoryPanelScrollEngine:ScrollPanelByMouseWheel");
+                if (null == methodtopatch) API.Utility.Logging.MetaLog("Intercepting Game.UI.InventoryPanelScrollEngine:ScrollPanelByMouseWheel() failed");
+                return methodtopatch;
+            }
+        }
+}