challenges: use tags fix (268157c) to allow guild info editing (not
working for _party for some reason)
challenges: slightly prettier graphs (i'm still not satisfied, but later)
challenges: can delete challenge
challenges: float-right edit button, us icons for consistency
challenges: more html futzing
challenges: make @editable dynamic so we can add tasks when in edit mode
challenges: move challenge specs to accordion header, add subscribers count
groups: make edit button consistent too