Error sharing as iframe GeoStory or Dashboar

[ElenaGallo]

Description

It is not possible to share as iframe a geostroy or dashboard

How to reproduce

• Login as admin
• Open a geostory/dashboard
• Click on Share
• Click on Embed
• Copy the iframe
• Past on a new html page (en example here: dash.zip)

Expected Result

It is possible to see the embed dashboard or geostory

• [x] Not browser related

Browser info

(use this site: https://www.whatsmybrowser.org/ for non expert users)

Browser Affected	Version
Internet Explorer
Edge
Chrome
Firefox
Safari

Other useful information

It seems a regression introduced after #8457. The tool works well in QA.