Missing CSRF token causes warning that the content will be executed in restricted mode to be displayed when displaying a previous revision of a page

Reproduction

1. create a new page and save it
2. modify the same page and save it
3. open the history tab at the bottom and select the previous version (1.1) to be displayed

Result

The previous version is displayed with the following warning message: "For security reasons, the document is displayed in restricted mode as it is not the current version. There may be differences and errors due to this."

Expected result

No warning displayed