If you have a component that can be enabled/disabled attached to a prefab, then create an override by enabling or disabling the component in the Inspector, the blue indicator does not appear next to the component name. Affects all components that can be enabled/disabled.

1. Install Unity
2. Open the attached project
3. Open MainScene.scene
4. Select the "LightPrefab" object in the Hierarchy
5. Turn the Light Component off in the Inspector

Result:
No indicator is shown in the Inspector to show that the setting is overriden.

Expected Result:
A blue highlight should be shown next to the Component name, replicating the behaviour shown when enabling or disabling GameObjects in Prefabs.