Becky Siegel 428ec67a7d Prepare gr-diff-comment-thread for use in comment thread view
- Updaotes the unresolved property to be public, and reflects the
  attribute. This will be used for the toggle to show unresolved threads
  or all threads.
- Update logic to always show drafts at the end of sorted comments.
  Without this, the thread could get in a weird state where you can
  still add another draft, but since they are not threaded, and once the
  comment is published, its date changes to the published date anyway,
  so its ordering will be at the end.
- This change also adds the __draft attribute in gr-diff-comment-api so
  that draft comments will render correctly in the new view.

Change-Id: Icacc46ab5fd643b061ecfac8dcd313f815d17199
2018-02-05 17:16:30 -08:00
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