Add hide_main_navigation_menu setting.

main/inc/lib/userportal.lib.php

@@ -1013,6 +1013,11 @@ class IndexManager
             unset($this->tpl->menu_navigation['myprofile']);
         }
 
+        $hideMenu = api_get_configuration_value('hide_main_navigation_menu');
+        if ($hideMenu === true) {
+            return '';
+        }
+
         // Main navigation section.
         // Tabs that are deactivated are added here.
         if (!empty($this->tpl->menu_navigation)) {

main/install/configuration.dist.php

@@ -284,5 +284,5 @@ $_configuration['system_stable'] = NEW_VERSION_STABLE;
 // $_configuration['update_users_email_to_dummy_except_admins'] = false;
 // Certification pdf export orientation
 // $_configuration['certificate_pdf_orientation'] = 'landscape'; // It can be 'portrait' or 'landscape'
-
-
+// Hide main navigation menu (left column in userportal)
+// $_configuration['hide_main_navigation_menu'] = false;