Ticket #2724: gracefully handle attempts to delete or fave/unfave a remote Twitter...

Ticket #2724: gracefully handle attempts to delete or fave/unfave a remote Twitter notice if a failure occurs.

Most annoying error case being where the notice was already faved or deleted on Twitter! :)
Such errors will now just fail out and log a note to the syslog -- the rest of what we were doing will continue on unhindered, so you can still delete, favorite, etc and it just won't sync the info over in that case.