Bug 892757 - Also listen for events with -actorId in Style Editor client; r=dcamp

--HG--
extra : amend_source : b51769b6dd414ffeab01e8066074c0ee05d64ef3
Merge m-c to fx-team.
Bug 884397 - Implement structured logging in Log4Moz; r=gps
Merge fx-team into mozilla-central