Request: Allow multiple CFG scale values for sample images

[leppie]

A good indicator that your training is going bad is when you start getting artefacts and rainbows at CFG scale 15 or lower.

Allow a comma seperated list to generate sample images for more than 1 setting. Eg 7, 15, 19. Maybe a grid?

Bonus (dream) feature: Implement detection of rainbows and artefacts in code at a specified CFG scale to stop training early. Obviously a lot trickier, especially artefacts.

[d8ahazard]

This one is tricky. Right now, the UI uses a "number" input, so switching it to respect a list of values is not as easy as with a string, like concept token. But, I can understand the value of the point, so I'll stick it in the back of my brain and think on it a bit...