Avatars - add a cropping mechanism for people/horses

* can the upload be croppable? when trying to get the right size photo, the one I selected was too zoomed out, and then after resizing it was too zoomed in. does that make sense? very much a nice to have!

* can the upload be croppable? when trying to get the right size photo, the one I selected was too zoomed out, and then after resizing it was too zoomed in. does that make sense? very much a nice to have!