Only use Canonical's time format setting when running Unity
Only use Canonical's time format setting when running Unity

https://bugzilla.gnome.org/show_bug.cgi?id=745935

tshikaboom/geary,tshikaboom/geary,emersion/geary,martinra/geary,githubnemo/geary,robol/geary,AtticHacker/geary,robol/geary,martinra/geary,tshikaboom/geary,jimbonator/geary,glebihan/geary,mjog/geary,aatishnn/geary,glebihan/geary,githubnemo/geary,aatishnn/geary,mjog/geary,martinra/geary,emersion/geary,mjog/geary,glebihan/geary,githubnemo/geary,AtticHacker/geary,jimbonator/geary,robol/geary,aatishnn/geary,jimbonator/geary,emersion/geary,AtticHacker/geary