Load Open Sans for users who don't have it
Don't draw the wordcloud until the fonts have loaded

(or failed to load)
Use color, zooming to better illustrate which word is selected
Refactor client code

The ui logic was starting to get too complex, so this refactor has
OverviewWordCloud simply managing the data and firing events as it
changes, rather than having it know about all the UI dependents of that
data.
OverviewWordCloud: Combine inclusion/exclusion logic into one function
Add lightweight ChipList component around selectonic
Add editing logic