Fix button for "All Problem Commits" on Owners packages

Summary:
Ref T9482. This button goes to the wrong place and this table conditionally hides itself so I missed it.

Instead:

• Always show the table, with an empty string if there are no relevant commits.
• Link to a working UI.

Test Plan: Saw table. Clicked button.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9482

Differential Revision: https://secure.phabricator.com/D14189