Bug 1003843 - Follow up to Bug 951676 - [Messages][Refresh] Add specific image in case of more than one recipient in the list threads. r=schung

Ok, probably the best option for now would be the same approach like here: https://github.com/mozilla-b2g/gaia/blob/09ffd07964de1ad15d7ab34ab89c78bdf223605a/apps/sms/js/thread_list_ui.js#L208-L216 and fix it all together in https://bugzilla.mozilla.org/show_bug.cgi?id=1014226

Does it work for you?