[KBFS-3596] Fix cannot set on an immutable record error (#14683)
[KBFS-3596] Fix cannot set on an immutable record error (#14683)

* refactor a bit to reduce struct churn

* fix flow

* fix flow (#14701)

* fix another added reducer

* a few more cleanups

* switch to merge

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