Open the editing of the Home page in JD Builder. Using the live preview you will see that all these are a single element each created using the Raw Html element: www.screencast.com/t/P5xSgWP9
So if you open the settings of any one of the elements there in the HTML code you will get the class of the icon used: www.screencast.com/t/ybQj8ti1 and then simply add the class of the icon you wish to add here.
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