[Prefabs] Blue highlight (override indicator) is missing for Cooking options dropdown in Mesh collider even though changes are visible in Override window. Refer the attached video. The reason is that MeshColliderEditor is not using a PropertyField for cooking options, nor is it wrapping the property in BeginProperty/EndProperty.

Steps to reproduce:
1) Create a new project
2) GameObject > 3D Object > Plane
3) Drag to Project folder to make a prefab
4) Select Plane > Cooking Options > Everything

Actual result: Blue highlight is missing even though changes are visible in Override window

Expected result: Changes made to the prefab should be highlighted

Occurring in: 2020.2.0a20, 2020.1.0f1, 2019.4.7f1, 2018.4.15f1.

Environment: Both Windows and Mac