ui: drop ac_search and ac_stop

Both keys exist already: "ac_search" is "find" and "ac_stop" is "stop".

Fixes: 37810e80
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170728063415.27480-1-kraxel@redhat.com