Feature Request: I would like to be able to create or change icons in my customized activities. How can I do that? In case is not possible is there a way to request this activity customization?

I currently created a new activity for Skateboarding since there is none in the activities. I want to change the icon from the default to maybe the snowboarding icon? I the closest one. If posible it would be great to be able to ad customized icons