Enable the title field for non-admin user in Sugar

Dear community, 

I’ve noticed that in Sugar the title field of a useris readonly by default for non-admin user. I would like to enable if admin and non admin user. I’ve tried different modifications in 

custom/modules/Users/metadata/editviewdefs.php but custom/modules/Users/tpls/EditViewFooter.tpl but without success.

I tried to add this in editviewdefs.php 

array (
  'name' => 'title',

But it's not working.

Someone knows how I can do that ? 

Kind regards,