ui_yeah and ui_nope option choices and ordering

[rundel]

I like both of these functions and would like to use them in ghclass when users request potentially destructive actions. However, I'd like the option to control what choices are presented to the user and whether or not they are randomized.

Both of these behaviors were also unclear to me from the docs.

Happy to propose a modified version of both if that would be helpful.

[jennybc]

It sounds like you might have some good suggestions for the docs here and also that you might ultimately want to inline versions of these functions in ghclass. A PR to drive discussion would be great.