Bug 833981 - [Email] Black screen when sending email to contact before setup. r=schung, a=v1.0.0 by lsblakk

cherry-picked 474c86518e354da36207b4c4f02d4a10c981e614 from gaia/master
which was landed in merge e59ad4d177675eb1f25fb7406a439d77195441db
Merge pull request #7869 from asutherland/email-cancel-create-v1.0.0

Bug 833981 - [Email] Black screen when sending email to contact before setup. r=schung, a=v1.0.0 by lsblakk