Grayscale textures are broken in 4.2.0.2188

[Doprez]

Release Type: Official Release

Version: 4.2.0.2188

Platform(s): Windows

Describe the bug When importing a grayscale file into the editor it will be completely broken.

you can make it at least shows something if you uncheck all of the options in the feature panel but it just shows white noise.

This is how it looks in 4.2.0.2122:

To Reproduce Steps to reproduce the behavior:

1. get a grayscale image

2. import it into the editor

Expected behavior Textures should look good.