rename trip_summary_header haml back so passes tests; this haml is being used in itinerary_email and provider_email, but not for trip_email(using trip_plan_summary_header)
fix bug that some itineraies not re-appear after removing previous filter [fixes#70943512][fixes#71096300];rename Cost to Fare in Review page (fitler & sorter) [fixes#71096306];set min transfer as 0 [fixes#71096286]