R1:9bf4df2c1ddf

Allow demoted builds to automatically promote if builds pass after a restart

Summary:
Ref T13124. See PHI584. When you create a draft revision and it automatically demotes to "Changes Planned + Draft" because builds fail, let it promote to "Needs Review" automatically if builds pass. Usually, this will be because someone restarted the builds and they worked the second time.

Although I'm a little wary about adding even more state transitions to the diagram in T13110#237736, I think this one is reasonably…