declaration order sorting

Source/Editor/Content/Items/VisualScriptItem.cs

@@ -75,6 +75,8 @@ namespace FlaxEditor.Content
             }
         }
 
+        public int MetadataToken => 0;
+
         /// <inheritdoc />
         public bool HasAttribute(Type attributeType, bool inherit)
         {
@@ -195,6 +197,8 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public ScriptType ValueType => _returnType;
 
+        public int MetadataToken => 0;
+
         /// <inheritdoc />
         public bool HasAttribute(Type attributeType, bool inherit)
         {

Source/Editor/CustomEditors/Editors/GenericEditor.cs

@@ -173,8 +173,16 @@ namespace FlaxEditor.CustomEditors.Editors
                             return string.Compare(Display.Group, other.Display.Group, StringComparison.InvariantCulture);
                     }
 
-                    // By name
-                    return string.Compare(Info.Name, other.Info.Name, StringComparison.InvariantCulture);
+                    // By declaration order
+                    if (Info.MetadataToken > other.Info.MetadataToken)
+                        return 1;
+                    else if (Info.MetadataToken < other.Info.MetadataToken)
+                        return -1;
+                    else
+                    {
+                        // By name
+                        return string.Compare(Info.Name, other.Info.Name, StringComparison.InvariantCulture);
+                    }
                 }
 
                 return 0;

Source/Editor/Scripting/ScriptType.cs

@@ -40,6 +40,22 @@ namespace FlaxEditor.Scripting
         /// </summary>
         public string Name => _managed?.Name ?? _custom?.Name;
 
+        /// <summary>
+        /// Gets a metadata token for sorting so it may not be the actual token.
+        /// </summary>
+        public int MetadataToken
+        {
+            get
+            {
+                if (_managed != null && IsProperty)
+                {
+                    ScriptMemberInfo finfo =  DeclaringType.GetField(string.Format("<{0}>k__BackingField", Name), BindingFlags.Instance | BindingFlags.NonPublic);
+                    return finfo.MetadataToken;
+                }
+                return _managed?.MetadataToken ?? _custom?.MetadataToken ?? 0;
+            }
+        }
+
         /// <summary>
         /// Gets a value indicating whether the type is declared public.
         /// </summary>
@@ -1444,6 +1460,11 @@ namespace FlaxEditor.Scripting
         /// </summary>
         string Name { get; }
 
+        /// <summary>
+        /// Gets a metadata token for sorting so it may not be the actual token.
+        /// </summary>
+        int MetadataToken { get; }
+
         /// <summary>
         /// Gets a value indicating whether the type is declared public.
         /// </summary>