[#4420] Missing locale string.

config/locales/en.yml

@@ -67,3 +67,4 @@ en:
   text_start_date_empty: "The start date is empty. If this form is submitted, no budget items will be created."
   text_end_date_empty: "The end date is empty. If this form is submitted, no budget items will be created."
   text_missing_period: "This deliverable is missing a date range so it cannot have budget items. Please save start and end dates before adding any budget items."
+  field_current_period: "Current period"