39771: * -> <b> (not <strong>), / -> <i> (not <em>) 18427, Step 1: Add |class=moz-text-html | to wrapping <div>, so users can add rules specific to HTML msgs to their user stylesheets (e.g. to ignore certain formatting). r=rhp Updating msg body UA stylesheets r=a=alecf git-svn-id: svn://10.0.0.236/trunk@78949 18797224-902f-48f8-a5cc-f745e15eee43