Fix deletion of non-Inbox created drafts.

Summary:
* Arguments were misordered when calling remote_delete().
* Don't select All Mail before moving UIDs to the trash -- otherwise, if
  you want to delete a draft on a thread, you might delete the whole thread!
  Arguably, the real shortcoming is that all our actions are assumed to
  operate on threads. But for now, let's at least do the right thing.

Test Plan:
Check that we can actually delete a draft created in the Gmail web
UI.

Reviewers: kav-ya

Reviewed By: kav-ya

Differential Revision: https://review.inboxapp.com/D560