BUR #57218 has been approved by @nonamethanks.
create implication traffic_mirror -> mirror
I'm unsure if this implication should exist because of cases where the mirror is facing away from the viewer (post #7759474), but I don't know if shouldn't exist either. Hand mirror does imply mirror and also has images where the mirror is facing away (post #11052404, etc.). I did just add mirror to images where it was clearly missing.
