Ability to Hide Testimonial Icon from Widgets

Currently any testimonial that is submitted with the testimonial form has what I consider to be an ugly purple heart icon. I think that Testimonials that do not have a [linked URL](https://roadmap.embedmyreviews.com/items/240-add-ability-to-link-a-testimonial-or-review-to-a-review-source-in-the-widget) should automatically have that icon hidden. Furthermore, testimonials that have a linked URL should be able to have a custom icon.  If you look at how Senja displays their carousel, you will see that the icon is shown for testimonials with external sources like Twitter and Product Hunt, but is hidden for basic text testimonials. Currently, Embed my Reviews has a 'Review Platform' display option which would hide the testimonial icon, but it would also hide the icon for other review sources like G2, Capterra, Facebook etc that we would want to show.