hide 'Next' button on 'Need a return trip?' page
Merge branch 'cgdevelop' into 69-remove-next-btn-from-need-return-trip-page
make 'next step' button available when user clicks 'edit trip'
more work on hiding/showing next step button
Merge pull request #23 from CG-CamSys/69-remove-next-btn-from-need-return-trip-page

hide 'Next' button on 'Need a return trip?' page