If you are not using the built-in renderer i.e. LWRP or HDRP, hiding objects in the scene view does not work.

1. Install Unity
2. Create a new project with the LWRP template
3. When the scene loads, attempt to toggle the visibility of any scene object

Expected Result:
Objects in the scene view are hidden when their visibility is toggled off.

Actual Result:
Objects are always visible in the scene view regardless of their visibility toggle.

Tested in Windows.

Occurs on 2019.1.0a10 with LWRP 5.2.1