Windows case sensitivity tweak in Project organization isn't recursive and doesn't apply to newly created folders in the project folder

**Your Godot version:** 3.2.3

**Issue description:** I noticed that the Windows case sensitivity tweak described in the Project organization isn't recursive and doesn't apply to newly created folders in the project folder. This needs to be solved as it can be confusing. (For the record, this is a tip I originally added.)

I don't know if there's a way to make the case sensitive flag apply:

- recursively (on existing folders),
- on subfolders created in the project folder after the flag has been set.

Help is welcome on solving this :slightly_smiling_face:

**URL to the documentation page:** https://docs.godotengine.org/en/latest/tutorials/best_practices/project_organization.html#case-sensitivity