fix: restoreElementWithProperties drops "parent" property (#5742)

Co-authored-by: Yosyp Buchma <yo@yosyp.co>
Co-authored-by: dwelle <luzar.david@gmail.com>

src/excalidraw-app/collab/Portal.tsx

@@ -18,6 +18,7 @@ import throttle from "lodash.throttle";
 import { newElementWith } from "../../element/mutateElement";
 import { BroadcastedExcalidrawElement } from "./reconciliation";
 import { encryptData } from "../../data/encryption";
+import { PRECEDING_ELEMENT_KEY } from "../../constants";
 
 class Portal {
   collab: TCollabClass;
@@ -152,7 +153,7 @@ class Portal {
           acc.push({
             ...element,
             // z-index info for the reconciler
-            parent: idx === 0 ? "^" : elements[idx - 1]?.id,
+            [PRECEDING_ELEMENT_KEY]: idx === 0 ? "^" : elements[idx - 1]?.id,
           });
         }
         return acc;