fix: elements would lose some states like scroll position because of "virtual parent" optimization (#427)

* fix: elements would lose some state like scroll position because of "virtual parent" optimization

* refactor: the bugfix code

bug: elements would lose some state like scroll position because of "virtual parent" optimization

* fix: an error occured at applyMutation(remove nodes part)

error message:
Uncaught (in promise) DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node

src/types.ts

@@ -466,3 +466,9 @@ export enum ReplayerEvents {
 }
 
 export type MaskInputFn = (text: string) => string;
+
+// store the state that would be changed during the process(unmount from dom and mount again)
+export type ElementState = {
+  // [scrollLeft,scrollTop]
+  scroll?: [number, number];
+};