Display total count, not unread, in headerbar for Drafts/Outbox
Display total count, not unread, in headerbar for Drafts/Outbox

This is a similar heuristic as in the folder list, as unread counts
in these folders is uninteresting.

martinra/geary,jimbonator/geary,mjog/geary,AtticHacker/geary,emersion/geary,aatishnn/geary,jimbonator/geary,aatishnn/geary,AtticHacker/geary,mjog/geary,glebihan/geary,robol/geary,emersion/geary,robol/geary,githubnemo/geary,martinra/geary,tshikaboom/geary,githubnemo/geary,glebihan/geary,tshikaboom/geary,glebihan/geary,mjog/geary,MohamedIM/geary-unofficial,emersion/geary,jimbonator/geary,geekvigilante/geary,AtticHacker/geary,githubnemo/geary,aatishnn/geary,robol/geary,martinra/geary,tshikaboom/geary