Allow "My Work" sidebar to be collapsed and expanded

"My Work" is a great place to store my personal notes and whiteboards. This area would be even more effective for me if I could choose to collapse the lefthand sidebar. The benefits are two-fold: one, I'd like more real estate on my screen to work on the document itself, and two, I'd like to be able to share my screen with a personal document loaded without the audience being able to see all the other document titles (which could contain sensitive information or just things I'd like to keep private).