Virtual Texture not available in the Material Domain settings of a Material

Virtual Texture is not available as an option for the Material Domain. Even if Virtual Texture support is enabled in the project settings.

Tested in //UE4/Release-4.25 @ CL 14469661 and this did NOT occur, so marking as a Regression.

1. Create a new blank project with Starter Content included
2. In the Project settings set Enable virtual texture support to true
3. Restart the editor
4. Open the M_TableRound material in the Content Browser
5. In the Details panel, click the dropdown menu for Material Domain

RESULT:

Virtual Texture is not listed as one of the Material Domain options

EXPECTED:

The option to set Virtual Texture as the Material Domain would be available