Preparations

• in IDE:
  • open core/units/users/users_event_handler.php file for editing
  • in the \UsersEventHandler::CheckPermission method declaration add this code fragment:

if ( $event->Name === 'OnEdit' ) {
    /** @var kPermissionsHelper $perm_helper */
    $perm_helper = $this->Application->recallObject('PermissionsHelper');

    return $perm_helper->finalizePermissionCheck($event, false);
}

• save changes
• open core/admin_templates/users/users_list.tpl file for editing
• wrap the a_toolbar.AddButton( new ToolBarButton('edit' ... line with these tags <inp2:m_if check="m_CheckPermission" perm_event="u:OnEdit"> ... </inp2:m_if>
• save changes

Test

1. login to the Admin Console as a root user
2. go to Users Management → Users section
3. confirm, that the Edit toolbar button is visible and opens the current user for editing
4. logout
5. login to the Admin Console as a non-root user
6. go to Users Management → Users section
7. confirm, that the Edit toolbar button is NOT visible
8. logout