fix: add try/finally block in withoutSaving method to ensure state restoration (#5837)

Co-authored-by: ederjiang <eder@57blocks.com>

.changeset/rotten-poems-collect.md

@@ -0,0 +1,5 @@
+---
+'slate-history': patch
+---
+
+fix: add try/finally block in withoutSaving method to ensure state restoration

packages/slate-history/src/history-editor.ts

@@ -120,7 +120,10 @@ export const HistoryEditor = {
   withoutSaving(editor: HistoryEditor, fn: () => void): void {
     const prev = HistoryEditor.isSaving(editor)
     SAVING.set(editor, false)
+    try {
       fn()
+    } finally {
       SAVING.set(editor, prev)
+    }
   },
 }