Only call ComposerWidget.on_load_finished_and_realized() once
Only call ComposerWidget.on_load_finished_and_realized() once

https://bugzilla.gnome.org/show_bug.cgi?id=744141

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