chat_rpc: only send edit notifications on favorited TLFs
chat_rpc: only send edit notifications on favorited TLFs

Issue: KBFS-3084

keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client