Convert UDF collection values to YYYY-MM-DD when saving.

Fixes #1657
Merge branch 'release'

Merging release back to master after cherry-picking 1f0f44e17f to ensure
that the next merge from master to release can be ff-only.
Add forensic fields to ExportJob

This will make it a lot easier to understand what's going on with our
export jobs.
Add and use decorator `json_api_edit`
Merge pull request #1664 from steventlamb/bug/user_export_timeout

Add forensic fields to ExportJob
Merge pull request #1665 from RickMohr/json-api-edit

Add and use decorator `json_api_edit`