Allow iframe embedding of Prezi presentations
currently the iframe embed comes with sandboxing which prevents cross domain loading of javascript and other files.
This line in the iframe prevents it
sandbox="allow-forms allow-scripts allow-popups allow-same-origin allow-pointer-lock"
Unfortunatly that means prezi is also blocked and error messages like this occur
Access to Script at 'https://www.googleadservices.com/pagead/conversion.js' from origin 'https://prezi.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://prezi.com' is therefore not allowed access.
If you could add a check box which removes the sandboxing on iframes that would be great
Many thanks for the wonderful product
Jon
