my-dojos: multiple Content Security Policy resources loading block

[sandrobonazzola]

Opening https://zen.coderdojo.com/dashboard/my-dojos with Firefox 70 shows in console multiple Content Security Policy messages related to resource loading blocked by page settings ("font-src") on:

• https://js.intercomcdn.com/fonts/proximanova-semibold-italic.660bf63e.woff
• https://js.intercomcdn.com/fonts/proximanova-regular-italic.053a1112.woff
• https://js.intercomcdn.com/fonts/proximanova-semibold.46e3f047.woff
• https://js.intercomcdn.com/fonts/proximanova-regular.a7942249.woff