Use a tokenizer, not a gigantic poorly-ordered "<select />", to choose repositories in Owners
- Edited paths: include/exclude paths, from different repositories, different actual paths.
- Used "Add New Path" to add rows, got repository selector prepopulated with last value.
- Used "remove".
- Used validation typeahead, got reasonable behaviors?
The error behavior if you delete the repository for a path is a little sketchy still, but roughly okay.
Differential Revision: https://secure.phabricator.com/D19191