Fix Bug 1495546 - Localization fails in OnboardingMessageProvider if we've already localized strings before (#4460)
Fix Bug 1495546 - Localization fails in OnboardingMessageProvider if we've already localized strings before (#4460)


rlr/activity-streams,mozilla/activity-stream,mozilla/activity-stream,Mardak/activity-stream,rlr/activity-streams,sarracini/activity-stream,mozilla/activity-stream,rlr/activity-streams,mozilla/activity-streams,sarracini/activity-stream,Mardak/activity-stream,Mardak/activity-stream,sarracini/activity-stream,rlr/activity-streams,mozilla/activity-streams,sarracini/activity-stream,mozilla/activity-stream,Mardak/activity-stream