Wrong IDE loads when Visual Studio 2019 is selected

Visual Studio 2019 does not load even when it is selected as the chosen IDE. Instead the editor loads Visual Studio 2017. If you create a new C++ class after switching the IDE and restarting the Editor, it will load VS2019 as expected.

This was reported and tested in 4.22.1 (CL-6063286) and reproduced in Main 4.23 (CL-6573768). The option for VS2019 is not available in 4.21.

1. Open the UE4 Editor and create a Blank Code project
2. In the Editor click on the menu bar select 'Edit' -> 'Editor Preferences' -> 'Source Code' -> 'Source Code Editor' -> Select 'Visual Studio 2019'
3. Restart when prompted
4. Open an existing C++ file in the Editor (like GameModeBase for example)

Results: VS2017 loads instead

Expected: VS2019 should load because it was selected as the chosen IDE