This moves the call to sort in daemon/history to a function to be
called explicitly when we're done adding elements to the list.
This speeds up `docker ps`.
Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Upstream-commit: e963179c790ec49b28fae0d7ebc0d9d2b3ac0b72
Component: engine