update CCK to 3.10, fixing unity 2021 crash :)

Assets/ABI.CCK/Scripts/Editor/GUIExtensions/GenericMenuBuilder.cs

@@ -0,0 +1,30 @@
+#if UNITY_EDITOR
+using UnityEditor;
+using UnityEngine;
+
+namespace ABI.CCK.Scripts.Editor
+{
+    public class GenericMenuBuilder
+    {
+        private readonly GenericMenu _menu = new GenericMenu();
+
+        public void AddMenuItem(string itemName, bool condition, GenericMenu.MenuFunction callback)
+        {
+            if (condition)
+                _menu.AddItem(new GUIContent(itemName), false, callback);
+            else
+                _menu.AddDisabledItem(new GUIContent(itemName));
+        }
+        
+        public void AddSeparator(string path = "")
+        {
+            _menu.AddSeparator(path);
+        }
+
+        public void DropDown(Rect position)
+        {
+            _menu.DropDown(position);
+        }
+    }
+}
+#endif