Packaged projects on Windows and Mac are not opening as windowed fullscreen

When you package a project on Windows or Mac, the project is then opened in windowed mode instead of windowed fullscreen.

Regression:
Works in 4.12.5-3039270
Does not work in 4.13.2-3172292
Does not work in 4.14.0-3195953

1. Create a new project in 4.14
2. Package the project for Windows or Mac
3. Run the project

Results: The project opens in windowed mode instead of fullscreen.
Expected Results: Windowed fullscreen mode.