[WEB] fix undefined elements (#3651)

* [WEB] $lang is not used in this context

* [Web] $stmt variable is not used

* [WEB] fix undefined function

* [WEB] remove undefined variable $display

data/web/json_api.php

@@ -551,7 +551,7 @@ if (isset($_SESSION['mailcow_cc_role']) || isset($_SESSION['pending_mailcow_cc_u
                 break;
 
                 default:
-                  $data = rsetting('details', $object);
+                  $data = rsettings('details', $object);
                   process_get_return($data);
                 break;
               }

data/web/mailbox.php

@@ -461,7 +461,7 @@ $_SESSION['return_to'] = $_SERVER['REQUEST_URI'];
             <div class="table-responsive">
               <table class="table table-striped" id="recipient_map_table"></table>
             </div>
-            <div class="mass-actions-mailbox" style="display: <?php echo $display; ?>">
+            <div class="mass-actions-mailbox">
               <div class="btn-group">
                 <a class="btn btn-sm btn-default" id="toggle_multi_select_all" data-id="recipient_map" href="#"><span class="glyphicon glyphicon-check" aria-hidden="true"></span> <?=$lang['mailbox']['toggle_all'];?></a>
                 <a class="btn btn-sm btn-default dropdown-toggle" data-toggle="dropdown" href="#"><?=$lang['mailbox']['quick_actions'];?> <span class="caret"></span></a>