Added title to the preferences dialog: Closes bgo#730457
Added title to the preferences dialog: Closes bgo#730457

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