Add validate nested

[inveterateliterate]

Wrote a helper for a few apps around validating nested forms, can look to abstract into here

[dpikt]

👍👍

[dpikt]

Wanna do some perf testing since the function is recursive

[dpikt]

or migrate to yup!

[dpikt]

@chawes13 thoughts on switching to validateNested for our default validate function?

[dpikt]

(assigning so you can keep this in your backlog)

[chawes13]

I'm down for this!