folder_branch_ops: after a tlf handle change, force re-identify
folder_branch_ops: after a tlf handle change, force re-identify

Issue: KBFS-1023

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