Removed validation dialog from worker.html.
Admin UI: Limited "find related" searches.
Added timestamp fomatting filter.
Fixed: Time Sheets: clicking Create button creates an already submitted
time sheet with no controls. (#187, https://trello.com/c/hIdws9dW)
  As-designed.  See comments in Trello task.
  Updated `timesheet/current` GET endpoint; service, @Controller.