Add client-side validation to create TrafficSource
Add client-side validation to create TrafficSource

Add client side validation to the dialog box for creating a
TrafficSource so that it doesn't periodically attempt to create a
TrafficSource that doesn't have any contents. Will subsequently add
back-end validation to the same effect.

HubSpot/Baragon,HubSpot/Baragon,HubSpot/Baragon