Bug 983311 - Allow empty strings in skillLevel and ageGroup model and persist during update
Bug 983311 - Allow empty strings in skillLevel and ageGroup model and persist during update

gvn/webmaker-events-2,mozilla/events.webmaker.org,mozilla/events.webmaker.org,gvn/webmaker-events-2,gvn/webmaker-events-2,mozilla/events.webmaker.org