How an itinerary was created. createButton is "Create New Itinerary" in the Add to
Itinerary sheet; firstSave is Done in the sheet for a user with no itineraries, which
creates one for them.
The itinerary fields a user can change in the Edit Itinerary sheet
Generated using TypeDoc
How an Add to Itinerary sheet ended.
added,removedandaddedAndRemovedcome from Done changing memberships;noChangeis Done with nothing to change;dismissedis the sheet closed without Done.