Set campaign and region to null by default
Set campaign and region to null by default

Campaign and region are getting passed down by the dashboard view
from the dropdowns, so there is no need to provide defaults in the
NCO dashboard component.

SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/polio,SeedScientific/polio,unicef/polio,unicef/polio