fix: restore stored marks if they exist (#863)

Author: artem-harbour

packages/super-editor/src/extensions/block-node/block-node.js

@@ -3,6 +3,7 @@ import { helpers } from '@core/index.js';
 import { Plugin, PluginKey } from 'prosemirror-state';
 import { ReplaceStep } from 'prosemirror-transform';
 import { v4 as uuidv4 } from 'uuid';
+import { Transaction } from 'prosemirror-state';
 
 const { findChildren } = helpers;
 const SD_BLOCK_ID_ATTRIBUTE_NAME = 'sdBlockId';