Summary: Fixes T4767. I believe 80% of this was actually caused by the author issue fixed in T5771, but this should help make the other 20% debuggable. - Record why we didn't autoclose a commit when we process it. - Show branch autoclose status in the main branch table. - Show commit autoclose status on the edit screen. - Add documentation about how to find these statuses and what they mean. Test Plan: - Read documentation. - Viewed branches and hovered over the various states. - Viewed commits in various states and checked the "Autoclose?" field. - Pushed some commits and saw autoclose activate. Reviewers: btrahan Reviewed By: btrahan Subscribers: epriestley Maniphest Tasks: T4767 Differential Revision: https://secure.phabricator.com/D10348