ISTWCMS-5546 Move Mailchimp and Social Intents blocks into the external embeds section

Lily Yanrequested to merge
feature/ISTWCMS-5546-l26yan-Move-Mailchimp-Social-Intents-blocks-into-external-embeds-seciton into 1.0.x

ISTWCMS-5546 Move Mailchimp and Social Intents blocks into the external embeds section

Merge request reports