When a revision is closed, always promote it out of draft
Fixes T13300. Currently, if you create a revision and then immediately land it (either using --draft or just beating Harbormaster to the punch) it can be stuck in "Draft" forever.
Instead, count landing changes like this as a publishing action.
- Used arc diff --hold to create a revision, then pushed the commit immediately.
- Before change: revision closed, but was stuck in draft.
- After change: revision closed and was promoted out of draft.
Reviewed By: amckinley
Maniphest Tasks: T13300
Differential Revision: https://secure.phabricator.com/D20565