117 split trip selection form into individual pages

fixes CG-CamSys/Backlog#117 "Split Trip Selection Form Into Individual Pages"
fixes CG-CamSys/Backlog#185 "The Day of Birth picker always shows the number of days in the current month"
fixes CG-CamSys/Backlog#71 "Fix the Location picker system"
fixes CG-CamSys/Backlog#79 "The Back button does not work"