Editor doesn't restart instead Hub opens up on selecting Restart Editor from popup when changing Graphics APIs.

Steps to repro:
1. Create a new project.
2. File > Build Settings > Player Settings.
3. Other Settings > Uncheck "Auto-Graphics API for Window" checkbox.
4. Add any Graphics APIs from the list > move to the top of the list.
5. Select "Restart Editor" from "Changing editor graphics device" pop up.

Note:
The feature introduced in 2019.2.0a8.

Actual Result:
Editor doesn't restart instead Hub opens up.

Expected Result:
Editor restart gracefully.

Reproducible on:
2019.2.0a8 (6479f4a6f153) , 2019.1.0b9

Environment:
Windows and MacOS