Prepend Universal Sections with vertical key

[rosiegrant]

For universal results, it would be helpful if we could prepend the the results class with the vertical key

Current:

Ideal:
yxt-Results yxt-Results--would be yxt-Results yxt-Results--creditcards (since creditcards is the vertical key)

Why: This would be helpful to target specific verticals with styling. Otherwise, the user would have to make a net-new card (not a bad thing, but seems a little bit silly if there are only a few things that should be tweaked). in this case, I want the credit card vertical .yxt-StandardCard-img to have a different background-size. Open to other places where this would make sense.