Make mail news handle inline background url styles which is how editor now sets background urls instead of using the obsolete background attribute on the body:
Bug #116867 --> convert background images from file urls to inline cid urls and attach the image as an inline part.This allows thunderbird and mozilla mail to support background images again.
Bug #170504 --> Compose from template/draft containing "Inline Styles" and a background image loses the background image drops the
inline style.
r=bienvenu
sr=sspitzer
a=sspitzer
git-svn-id: svn://10.0.0.236/trunk@146154 18797224-902f-48f8-a5cc-f745e15eee43