Fix docs polling for catalog-element (#494)
Fix docs polling for catalog-element (#494)

Fixes #369
customelements/v2,andymutton/beta,webcomponents/webcomponents.org,andymutton/v2,andymutton/v2,andymutton/v2,customelements/v2,andymutton/beta,customelements/v2,andymutton/beta,webcomponents/webcomponents.org,webcomponents/webcomponents.org,customelements/v2,andymutton/v2,andymutton/beta