I'd like to add a LinkedIn social media icon to the bottom of my footer. It needs to be a global setting. I have the icon loaded in the media folder. I just can't seem to find the style sheet to add the .png to the master template. I found the script here, but where do I add the "class style" with the .png? Here's my website, if that helps: https://dementiacampus.org/. Thank you.