"No conversations selected" appears with unread message border and shadow: Closes #6276
"No conversations selected" appears with unread message border and shadow: Closes #6276

AtticHacker/geary,emersion/geary,aatishnn/geary,emersion/geary,mjog/geary,githubnemo/geary,MohamedIM/geary-unofficial,tshikaboom/geary,kyoushuu/geary,glebihan/geary,mjog/geary,robol/geary,aatishnn/geary,kyoushuu/geary,githubnemo/geary,abn/geary,kpiwko/geary,tshikaboom/geary,emersion/geary,martinra/geary,AtticHacker/geary,robol/geary,tshikaboom/geary,rschroll/geary,aatishnn/geary,mpdeimos/geary,jimbonator/geary,jimbonator/geary,glebihan/geary,rschroll/geary,martinra/geary,geekvigilante/geary,glebihan/geary,robol/geary,AtticHacker/geary,jimbonator/geary,mjog/geary,githubnemo/geary,martinra/geary