Spotlight cone has a black frame in all views I'm using Blender 2.8, using the Eevee render.  I have added a spotlight.  The cone and the 'light bulb' show as black lines in any view, it's a bit like a wireframe.  Any idea how to get rid of these lines?
To get rid of all overlays in preview render:



Disable "show cone" in the light settings

Disable "show overlays" in 3D View

Disable "show Gizmo" also in 3D View