How to reproduce:
1. Create a new Project
2. Import ProBuilder
3. Create a new Shape and select it in Hierarchy
4. Click Tools -> Probuilder -> Actions -> Strip ProBuilder Scripts in Selection
5. Observe the Inspector window and the Mesh in the Scene window

Expected results: All ProBuilder components and scripts are removed and the Shape
Actual results: Only some of the ProBuilder components are removed. Sometimes the Mesh renderer is removed as well and Null ref errors are thrown

Reproducible with: 4.4.0, 4.5.0(2018.4.32f1, 2019.4.21f1), 5.0.0-pre.7, 5.0.0-pre.10(2019.4.21f1, 2020.2.6f1, 2021.1.b9, 2020.2.0a7)

Notes:
1. This can be experienced both in the Editor and in the Build. To reproduce the issue in a build, use the attached project to create a development build and run it. A message will be thrown indicating that not everything was stripped(In this case, the mesh is not stripped from disabled objects).