Previously we enforced that all key events are using QKeyCodes
at time they are sent:

  commit af07e5ff
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Fri Sep 29 11:12:00 2017 +0100

    ui: convert key events to QKeyCodes immediately

This commit forget to fix the code for the legacy 'sendkey'
command which still accepts key numbers from the user, which
then need converting to QKeyCodes
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-id: 20171019142848.572-3-berrange@redhat.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>