Bulk actions + Extra data

- fixed issue on bulk action being run even without any items selected
- added WP like feature regarding item selection, if all items are checked, it also checks the header/footer checkboxes
- fixed issue where the selection state was not properly reset
- added List column to subscribers
- added json_encode/json_decode to Twig

lib/Config/Menu.php

@@ -1,5 +1,6 @@
 <?php
 namespace MailPoet\Config;
+use \MailPoet\Models\Segment;
 
 if(!defined('ABSPATH')) exit;
 
@@ -80,6 +81,9 @@ class Menu {
 
   function subscribers() {
     $data = array();
+
+    $data['segments'] = Segment::findArray();
+
     echo $this->renderer->render('subscribers.html', $data);
   }