Display "Locations list" and "Locations map" links for read only users

[AguirreIF]

Hi, for users with Read permission in the module Locations, the Locations map link is not visible because it is inserted (from app/tools/menu.php) only for users with Write permission, with this check in app/tools/all-locations-list.php:

<?php
if($User->get_module_permissions ("locations")>=User::ACCESS_RW) {
include('menu.php');
...

So in this PR I extracted those links from app/tools/menu.php and added them to the app/tools/all-locations-list.php and app/tools/all-locations-map.php files.

Hope it makes sense :)