Button as child of .prose has blue text

[chriswhong]

When Button uses an a element and is a child of .prose, its text shows up as blue on blue. We got around this by passing in passthroughProps with all of the same classes the Button component would use but with unprose added, but this defeats the purpose of using the component.

There were two instances of using this in the help docs, I am not sure if there are others throughout the other docs sites.

It's also possible there's an easier fix I am not aware of, just leaving this here in case we should account for this in mr-ui