Fix some pagination/redirect issues for repositories

Summary:
Ref T10923. Paging wasn't being applied correctly when creating new repositories after API changes.

Also, the first redirect after creation wasn't sending users to the right place.

Test Plan:

• Created a new repostiory, got redirected properly.
• Verified that new repostiory flow has the correct fields (name, callsign, etc) and Conduit API has the correct fields (everything).

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10923

Differential Revision: https://secure.phabricator.com/D15865