fix(category): completename rendered instead of short name

fix #2424

Signed-off-by: Thierry Bugier <tbugier@teclib.com>

inc/category.class.php

@@ -155,7 +155,7 @@ public static function getCategoryTree($rootId = 0, $helpdeskHome = false) : arr
 
       $categories = [];
       foreach ($result as $category) {
-         $category['name'] = Dropdown::getDropdownName($cat_table, $category['id'], 0, true, false);
+         $category['name'] = (new DbUtils)->getTreeLeafValueName($cat_table, $category['id'], false, true);
          // Keep the short name only
          // If a symbol > exists in a name, it is saved as an html entity, making the following reliable
          $split = explode(' > ', $category['name']);