Fix attributes keys order

js/Utility.js

@@ -211,10 +211,13 @@ export default class Utility {
      */
     static mergeArrays(a = [], b = []) {
         let result = []
+        a = [...a]
+        b = [...b]
+        restart:
         for (let j = 0; j < b.length; ++j) {
             for (let i = 0; i < a.length; ++i) {
                 if (a[i] == b[j]) {
-                    // Found a corresponding element in the two arrays
+                    // Found an element in common in the two arrays
                     result.push(
                         // Take and append all the elements skipped from a
                         ...a.splice(0, i),
@@ -223,10 +226,8 @@ export default class Utility {
                         // Take and append the element in common
                         ...a.splice(0, 1)
                     )
-                    j = 0
-                    i = 0
-                    b.shift()
-                    break
+                    b.shift() // Remove the same element from b
+                    break restart
                 }
             }
         }

js/serialization/Grammar.js

@@ -324,9 +324,9 @@ export default class Grammar {
         r.LocalizedText,
         r.InvariantText,
         r.PinReference,
-        Grammar.createEntityGrammar(r, Vector2DEntity, true),
         Grammar.createEntityGrammar(r, VectorEntity, true),
         Grammar.createEntityGrammar(r, LinearColorEntity, true),
+        Grammar.createEntityGrammar(r, Vector2DEntity, true),
         r.UnknownKeys,
         r.ObjectReference,
         r.Symbol,

js/serialization/ISerializer.js

@@ -89,7 +89,15 @@ export default class ISerializer {
         let result = ""
         let fullKey = key.concat("")
         const last = fullKey.length - 1
-        for (const property of Object.getOwnPropertyNames(object)) {
+        const attributes = /** @type {EntityConstructor} */(object.constructor).attributes
+        const keys =
+            attributes ?
+                Utility.mergeArrays(
+                    Object.getOwnPropertyNames(attributes),
+                    Object.getOwnPropertyNames(object)
+                )
+                : Object.getOwnPropertyNames(object)
+        for (const property of keys) {
             fullKey[last] = property
             const value = object[property]
             if (value?.constructor === Object) {