preserve bindings if present and fix testcases

src/data/restore.ts

@@ -154,7 +154,6 @@ export const restoreElementWithProperties = <
   if (PRECEDING_ELEMENT_KEY in element) {
     base[PRECEDING_ELEMENT_KEY] = element[PRECEDING_ELEMENT_KEY];
   }
-
   return {
     ...base,
     ...getNormalizedDimensions(base),
@@ -237,7 +236,6 @@ const restoreElement = (
         startArrowhead = null,
         endArrowhead = element.type === "arrow" ? "arrow" : null,
       } = element;
-
       let x = element.x;
       let y = element.y;
       let points = // migrate old arrow model to new one

src/data/types.ts

@@ -1,4 +1,5 @@
 import {
+  Arrowhead,
   ExcalidrawBindableElement,
   ExcalidrawElement,
   FontFamilyValues,
@@ -89,6 +90,7 @@ export interface ImportedDataState {
             end?: {
               type: ExcalidrawBindableElement["type"];
             } & MarkOptional<ElementConstructorOpts, "x" | "y">;
+            endArrowhead?: Arrowhead | null;
           } & ElementConstructorOpts)
       )[]
     | null;