**System Information**
Operating system:
Graphics card:
**Blender Version**
Broken: Blender 2.8 RC2
Worked: (optional)
**Short description of error**
**Exact steps for others to reproduce the error**
1. Create a UV sphere.
2. Switch to Vertex paint
3. Paint with any color, red e.g.
4. Press S-key now to sample a color.
-> After sampling a color, an empty options window appear at the left bottom corner.
A click on the empty window let it disappear. Nothing happen here. That's not really a bug but not nice.