Boot to the upgraded/downgrade system after upgrade or rollback by default (rpm-ostree)

[Leandro Santiago <leandrosansilva gmail com>]

I am on something based on CentOS 7 (generated by rpm-ostree-toolbox)
and when I upgrade the system with rpm-ostree upgrade, when I reboot
the machine, the grub default entry is to the version before the
upgrade. The same happens with the rollback. Is it possible to change
this behaviour and make the resulting tree from the last action
(upgraded or rollback'd) be the default on boot? As bootloader I am
using grub2 (but there is no problems changing to syslinux if
necessary).

-- 
Sent from my mind