[#4182] Added an OverheadBudget to track a Deliverable's overhead.

app/helpers/contracts_helper.rb

@@ -2,6 +2,7 @@ module ContractsHelper
   def setup_nested_deliverable_records(deliverable)
     returning(deliverable) do |d|
       d.labor_budgets.build if d.labor_budgets.empty?
+      d.overhead_budgets.build if d.overhead_budgets.empty?
     end
   end
 end