Sheet Menu - Automatic Slide Out When Clicked On Rest of Browser

The sheet menu gives you the possibility to slide in your selections. But in order to get them out of the screen, you need to click the same button (1 below here).

As often you see with other websites/programs, if you click anywhere else than the object (3 below here) the object disappears. I would like to have the same behavior to have a better users experience.

So steps are:

1. Open your selections
2. Select somewhere outside the object
3. Selections are closed