Summary:
Ref T4245.
- Rename "Clone/Checkout As" to "Short Name" in the UI.
- Allow any repository to have a short name, not just hosted repositories.
Test Plan:
- Ran migration.
- Reviewed old transactions, saw they looked good.
- Edited an existing repository's short name.
- Gave an imported repository a new short name.
- Removed a repository's short name.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4245
Differential Revision: https://secure.phabricator.com/D14989
