Access to package document disappears for collaborators if owner renames document

[gkamener]

If a package owner renames a package document after collaborators have accepted a collaboration invite, the package will no longer be visible to the collaborators.

To replicate the issue:

1. Package document owner invites collaborator
2. Collaborator accepts invite
3. Package owner renames package document
4. Collaborator no longer sees the package on their Collaborate page

Workaround:
5. Owner must send new invite to collaborator to accept before they can regain access to the package document