feat(main: Added default block classes

upgrade/upgrade-1.19.0.php

@@ -0,0 +1,21 @@
+<?php
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+function upgrade_module_1_19_0($module)
+{
+    $existing = Db::getInstance()->executeS(
+        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_group` LIKE \'default_block_class\''
+    );
+
+    if (!empty($existing)) {
+        return true;
+    }
+
+    return Db::getInstance()->execute(
+        'ALTER TABLE `' . _DB_PREFIX_ . 'ws_customhtml_group`
+         ADD COLUMN `default_block_class` VARCHAR(128) NOT NULL DEFAULT \'\' AFTER `custom_class`'
+    );
+}