I am trying to added the Facebook Messenger Theme to my Shopify store but it is not showing up. I am using the Boundless Free theme from Shopify. The prior Theme I had before was the Simple theme and the Messenger worked for that theme. Not sure if the Boundless theme is covering the Chat Icon or if it is not compatible. I followed the same procedure of copying and pasting the Messenger code into theme.liquid tab under the Body tag. Please advise.