Customize Testimonial button on Distribution tab

When we activate "Testimonials" as a source, we then have the option to turn it on in the Feedback Form form builder "Settings" tab. On the "Distribution" tab the button that represents the Testimonial form shows a Pencil icon and the words, "Write a review." I would appreciate it if we could edit that icon and button text. For example, I would like to replace the Pencil icon with the Favicon or logo of my website (by uploading the image), and edit the words to read, "Review us on Mysite.com." I think this would improve the user experience by making it crystal clear where their written review will appear, just as clear as it is for Google, Facebook, etc. I would also love the ability to move the position of that Testimonial button as we can with the other sources. I personally would like to show it as the first review source.