Issue Summary

Preview of shared drafts (from Collaborative editing) in non Collaborative editing mode will render the page in a popup window without DrawIO diagrams.

Steps to Reproduce

1. Create a draft in Collaborative editing and add DrawIO diagram. Add title eg. "123"
   
2. Set Collaborative editing to OFF
3. In order to recover shared drafts open Drafts under the menu.
4. Click view on our 123 draft

Expected Results

The page is rendered with all addons images and macros.

Actual Results

The page is rendered without a Draw io diagram.

Workaround

Contact support to recover the draft storage format and then recreate the page from it.