data_types: add a stopIfFull flag for block request actions
data_types: add a stopIfFull flag for block request actions

Issue: KBFS-3525

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