Pods: 标记为必需的自定义字段不适用于古腾堡编辑器

描述错误
我扩展了帖子类型并添加了两个自定义字段：
(1) 带有多选功能的简单自定义列表，以及
(2) 带有单选和默认值的简单自定义列表。

这些字段在帖子编辑器中正确显示（带有红色星号，第二个自定义字段默认为正确值）。 但是，当我做一个测试帖子时，我没有为第一个自定义字段选择任何值，并将第二个自定义字段保留为默认值，WP 允许我发布 - 没有错误或横幅告诉其他人。

再现
重现行为的步骤：
请参阅下面的屏幕截图。

预期行为
如果必填的自定义字段没有选择，则用户在不填写必填字段的情况下无法发布。

截图
扩展帖子类型并添加自定义字段。

创建一个新帖子进行测试。

豆荚版本

版本 2.7.12

WordPress 环境

调试信息
WordPress 版本：5.1.1

PHP 版本：7.0.33-0ubuntu0.16.04.4

MySQL 版本：5.5.5

服务器软件：nginx/1.10.3

您的用户代理： Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36

会话保存路径：/var/lib/php/sessions

会话保存路径存在：是

会话保存路径可写：是

会话最大生命周期：1440

操作码缓存：

应用程序：没有
内存缓存：否
OPcache：是
Redis: 没有
对象缓存：

APC：否
APCu：否
内存缓存：否
内存缓存：否
Redis: 没有
WPDB 前缀：wp_ideas_

WP 多站点模式：否

WP 内存限制：40M

当前内存使用：6.380M

当前内存使用（真实）：2.000M

Pods 全网激活：否

Pods 安装位置：/srv/www/ideas/wp-content/plugins/pods/

Pods Tableless 模式已激活：否

Pods Light Mode 已激活：否

当前活跃主题：二十六

当前活跃的插件：

作者小部件：2.4.8
FV 克隆屏幕选项：0.3
WordPress.com 的 Jetpack：7.1.1
按作者、嵌套类别和标题列出所有帖子：2.7.6
我的私人网站：2.14.2
Pods - 自定义内容类型和字段：2.7.12
搜索和过滤：1.2.11

</details>

## Pods Package Export (helpful!)
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