list of actions with more verbosity

[jpahullo]

Now, when some user was not found (in our cli process), we only show "S'ha eliminat l'usuari amb l'ID 0" (somehow like "user deleted with id 0").

If you want to show see really which users were tried to merge, we have to enter into the log message page.

We should provide the information provided to merge two users (whatever, the id, username, idnumber, etc) in the list of merging actions (view.php). This way, we would have more verbosity and it would be easy to see which operations failed.