Implement save/load events

src/utils/saveload.ts

@@ -14,6 +14,10 @@ export function Revive(editorState: IEditorState): void {
   editorState.historyCurrentStep = history.length - 1;
 
   // restore the parents and the selected container
+  ReviveHistory(history);
+}
+
+export function ReviveHistory(history: IHistoryState[]): void {
   for (const state of history) {
     ReviveState(state);
   }