Batch add Image paging separators

Short Description

在后台编辑器加个按钮，让图片后面可以自动加上分页符 Add a button to the classic editor, when clicking on it, all the images in the editor will be appended with a separator.

Batch add Image paging separators — a WordPress plugin by cc2017. Version 1.0, compatible with WordPress 5.0 – 5.2.23 and PHP 0+.