the thing about children().children('a'): I think it makes sense to make this more generalized: follow the lead [here](http://accessibility.oit.ncsu.edu/training/aria/modal-window/modal-window.js) and make a focusableElementsString for dropdowns. Or just do find('a') (I can't think of other dropdown elements we'd want to focus on). It may be overkill for this instance, but it's going to be helpful if a) we alter the html slightly, and b) if other people want to make their dropdowns accessible, but don't have the exact ul>li>a structure we have. I know @jmclaus  was asking about this PR earlier today.