Color picker layer is not closing after clicking twice on the same spot.

For example:
1. Go to Configration - Host - Graphs - Create new Graph
2. Add Items
3. Click on Color picker - overlay is shown.
4. Click again on the same spot
4.1 Or click on any empty space on the page.
Result:
Color picker is not closed.
Expected
Color picker is closing on clicking again on color icon, or empty space, or [x] button in the upper right corner of overlay, as it is happening with any other overlay (for ex. calendar).