We have redesigned the Sidebar features, and have improved navigation and performance. We have replaced images with font. The sidebar colors can be customized on accounts with the Advanced branding options enabled.
If you have multiple folders you can now collapse the top part of the sidebar by clicking Show less, and work with your folders structure more effectively. The folders structure loads faster due to the folder icons being removed, and the solution for loading has been enhanced.
We are working on further enhancements for the Sidebar and Folders options, so stay tuned!