Homestyx hydra

R1:f7b0c09ac47f

Make the "All Day Event" control use a checkbox instead of a dropdown

Summary:
This feels a little cleaner:

- Clean up transaction log a bit.
- Use a checkbox instead of a two-option dropdown.

This is a little messy because the browser doesn't send anything if the user submits a form with an un-clicked checkbox.

We now send a dummy value ("Hey, there's definitely a checkbox in this form!") so the server can figure out what to do.

Test Plan:
- Edited all-dayness of an event.
- Viewed…
Repository: R1 hydra
Commit Date: Oct 31 2016