New trip creation: should populate other fields too

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Current fields list for trips table: route_id,service_id,trip_id,trip_headsign,direction_id,block_id,shape_id,wheelchair_accessible

Of these, in the Schedules page when we create a new trip, only route_id and trip_id is populated. Also, at present they are filled by text input, whereas some of these should be fixed values depending on other tables (like service_id). It can cause trouble if saved without populating properly.

[answerquest]

One way to solve: Load all service_ids, shape_ids on page load, and make these as available options for when new trip is created. If needed, make a modal popup like shapefile upload feature where these selections have to be done by user. It would be great if along with the ids, more information would come esp for service_id : like which days of week, start end dates. Heck, load the whole calendar table on, it's so small anyways.

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For shape_id : if it has been finalized for that route in Routes page (ie, saved in sequence db), then assign that shape_id by default, depending on which direction_id the user picks. If not, then like in Routes page, mark which shape_id's are being used by other trips on that route+direction and then list the others. Explore ways to preview the shape. (spawn a popup window?)

[answerquest]

Structured new trip creation so that most of the Shedules > Most of the trips table is now pre-filled.