Generate Project files does not add Intellisense include paths for .generated.h files

Attempting to open a .generated.h file using intellisense results in an error due to the file not being found as the proper search file paths were not added when generating the project files.

Please read: I'm not 100% sure if this is required, as the users who reported it did not mention it, but to have this work properly in 4.19, I had to open the solutions properties > NMake > Include Search Path and click in the field once. No edit needed to be made, but after that, I was able to open the .generated.h through the steps listed above in 4.19. I tried this in 4.20 and it did not resolve the error. See the attached images for differences.

Regression?: Yes
This does not occur in 4.19.2

1. Create a new C++ project
2. Navigate to the project's GameModeBase.h
3. Right-click on the name of the .generated.h in the include near the top of the file
4. Attempt the open the file through the context menu
   Result: An error appears mentioning that the file is not found in the current directory or build system paths
   Expected: The file opens successfully

UE4.20 is missing the IntelliSense IncludePath for the *.generated.h files

UE4.20 is missing the IntelliSense IncludePath for the *.generated.h files

ETA for 4.20.2 hotfix

Cannot open Source File ".generated.h"

UE4.20 is missing the IntelliSense IncludePath for the *.generated.h files

.generated.h not found but it exists

UE4.20 and Visual Studio 2017 Errors

Visual Studio Intellisense Cannot Open Generated.h Files in 4.20

Problems with generated.h

Visual studio showing almost 200 False Errors