Fix FCM discussion embed snippet
Fix FCM discussion embed snippet

This belongs to liqd/adhocracy3#1789.

Fixes policycompass/policycompass#252.

cbotsikas/policycompass-frontend,policycompass/policycompass-frontend,mmilaprat/policycompass-frontend,mmilaprat/policycompass-frontend,policycompass/policycompass-frontend,mmilaprat/policycompass-frontend,bullz/policycompass-frontend,cbotsikas/policycompass-frontend,cbotsikas/policycompass-frontend,policycompass/policycompass-frontend,bullz/policycompass-frontend,bullz/policycompass-frontend