Unpin the "Share/Save/Read" pop-up & make it hover always

Unpin the "Share/Star/Mark as Read" balloon and make it always be available at the top right corner of the current view so that I can share it, save it or mark it as read from any point of the article. Currently, once you start reading, you have scroll back to the top to share/save or mark it as read. Instead, those options should scroll down with you as you move downwards while reading the post.