[Web] Fix symbol options encoding in rspamd item view

[Web] Feature: Allow to view mailq item content via postcat
[Web] Fix Rspamd not drawing

data/web/inc/ajax/queue_manager.php

@@ -1,16 +0,0 @@
-<?php
-session_start();
-require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/prerequisites.inc.php';
-header('Content-Type: text/plain');
-if (!isset($_SESSION['mailcow_cc_role']) || $_SESSION['mailcow_cc_role'] != 'admin') {
-  exit();
-}
-$docker_return = docker('post', 'postfix-mailcow', 'exec', array('cmd' => 'mailq'));
-
-if (isset($docker_return['type']['danger'])) {
-  echo "Cannot load mail queue: " . $docker_return['msg'];
-}
-else {
-  echo $docker_return;
-}
-?>