Add dismiss button to full screen demos (#161)
Add dismiss button to full screen demos (#161)


webcomponents/webcomponents.org,customelements/v2,customelements/v2,customelements/v2,andymutton/v2,andymutton/v2,webcomponents/webcomponents.org,webcomponents/webcomponents.org,andymutton/beta,andymutton/v2,andymutton/beta,customelements/v2,andymutton/v2,andymutton/beta,andymutton/beta