Fix history - the 2nd installment (#1014)

* don't regenerate versionNonce on pushEntry

* fix history handling around multi-point arrows

* remove filtering from getElementMap helper

src/element/mutateElement.ts

@@ -53,8 +53,8 @@ export function newElementWith<TElement extends ExcalidrawElement>(
 ): TElement {
   return {
     ...element,
-    ...updates,
     version: element.version + 1,
     versionNonce: randomSeed(),
+    ...updates,
   };
 }