- getPatchNum should check patch_set rather than patchNum. This fixes a
previous bug due to checking the wrong attribute that is surfaced
when threads in a unified view's thread group come from both the
patch and base patch num.
- Adds logic for sorting drafts, which should always be at the end,
regardless of date
- Use the draftID as rootId if it's the first (only) comment in a thread
Change-Id: I93c92dc77e158e245697e2f0ae01cde0af3a7ae1
3ae53d1ab8