cr_actions: implement copyUnmergedEntryAction.do()
cr_actions: implement copyUnmergedEntryAction.do()

Issue: KBFS-324

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