Support HTTP parameter prefilling in EditEngine forms for CustomFields
Summary:
Ref T9132. This allows you to prefill custom fields with ?custom.x.y=value, for most types of custom fields.
Dates (which are substantially more complicated) aren't supported. I'll just do those once the dust settles. Other types should work, I think.
Test Plan:
- Verified custom fields appear on "HTTP Parameters" help UI.
- Used ?x=y to prefill custom fields on edit form.
- Performed various normal edits.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9132
Differential Revision: https://secure.phabricator.com/D14634