Fix: Editing the commit message publishes draft patch set

If a patch set is draft, and the commit message is edited from
the Web UI, the new patch set is not a draft.

The draft status was being set on the new patch set, but should
be set on the patch set inserter.

Bug: Issue 2180
Change-Id: I035df9c9d6e46b0595fb1d9b017d284551d1b261
1 file changed