This sets up a bunch of callbacks. We're starting to get into Callback Hell, where there are things that need knowledge that I really don't want them to have.
However, edit fields for TimeDistanceEdit now propogate data back into the view model, which is then able to save the results.
This adds the code to show the new records in the UI, plus it adds them to the view model. Some of the representation changed in order to facilitate linking UI elements to particular records. There are now some buttons to create workouts of various types, clicking on a button adds a new row to the UI, and it also adds a new record to the view model. Saving the view model writes the records to the database.
This simplifies, though not as much as I was hoping, the patterns for accessing data along strict type patterns. I may see better results once I'm getting the Time/Distance views working.
