feature 2737: improve tag administration screen

show for every tag
- the number of photos
- link to public index page
- link to batch manager edit

add an event for extended description multi language strings (used for autocompletion and shown in the tag admin screen) instead of hard coded in the core [lang=..

git-svn-id: http://piwigo.org/svn/trunk@17765 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/batch_manager_unit.php

@@ -181,9 +181,6 @@ if (count($page['cat_elements_id']) > 0)
     );
   $template->assign(array('navbar' => $nav_bar));
 
-  // tags
-  $all_tags = get_all_tags();
-
   $element_ids = array();
 
   $is_category = false;