Steps to reproduce (or watch attached gif):
1. Open any Unity project
2. Create a new game object
3. Select it and add Line Renderer component
4. Disable Line Renderer component
5. Drag selected game object to the project view to create a prefab
6. Observe the way prefab looks in the project view

Expected result: line renderer is not visible on prefab in project view when disabled
Actual result: line renderer is visible in project view even though its disabled

Reproducible with: 5.4.4p1, 5.5.1p2, 5.6.0b6