Fix blank email due to Camel/Cased MIME type: Closes #7654
Fix blank email due to Camel/Cased MIME type: Closes #7654

See also #6530, something we really need to do.

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