Verify saving assets popup doesn't appear on saving the scene or quitting unity unless the user makes some change in the player, editor or quality settings.

Steps To Reproduce:
1. Launch the Editor.
2. Go to Unity -> Preferences
3. Check "Verify Saving Assets".
4. Return to the scene.
5. Create 3d or 2d game objects and save the scene.
6. Observe that "Verify Saving Assets" doesn't appear.

Expected Result:
Verify saving popup should appear on saving the scene.

Observed Result:
Verify saving popup doesn’t appear on saving the scene.

Notes:
1. The popup appears when changes in project settings or editor settings are made.
2. Unity loses focus if user click on any option in the "verify saving asset" popup.

Occurs on : 2018.3.0a1, 2018.2.0b4, 2018/.1.0f2, 2017.4.3f1, 2017.3.1p4, 2017.2.2f1, 2017.1.0f3

Environment :
Occurs only on Mac.