When having "git annex watch" running, unlocking files causes the watcher
to immediately lock/commit them.

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Possible approaches:

* The watcher could detect unlocked files by checking if newly added files
  are a typechange of a file already in git. But this would add git overhead
  to every file add.
* `git annex unlock` could add some type of flag file, which the assistant
  could check. This would work fine, for users who want to use `git annex
  unlock` with the assistant. That's probably not simple enough for most
  users, though.
* There could be a UI in the assistant to pick a file and unlock it.
  The assistant would have its own list of files it knows are unlocked.
  But I'm trying to avoid mandatory UI to use the assistant.
* Perhaps instead, have a directory, like "edit". The assistant could notice
  when files move into this special directory, and automatically unlock them.
  Then when they're moved out, automatically commit them.
* Alternatively, files that are moved out of the repository entirely could be
  automatically unlocked, and then when they're moved back in, it would
  automatically do the right thing. This may be worth implementing in
  combination with the "edit" directory, as different use cases would work
  better with one or the other. However, I don't currently get inotify
  events when files are moved out of the repository (well, I do, but it
  just says "file moved", with no forwarding address, so I don't know 
  how to find the file to unlock it.

[[!meta title="assistant: watcher_commits_unlocked_files"]]