Updating the page builder

【Corrections】
■Page builder update
・【Firefox, IE】Fixed the problem of Google map display instability.
・Fixed the bug of switching editor and adjusted CSS in WordPress 5.5.
・Fixed other minor bugs.

The following files have been modified for this update.

【Modified file】
languages/ja.mo
languages/ja.po
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/js/admin.js
pagebuilder/modules/googlemap.php
pagebuilder/modules/simple_table.php
pagebuilder/modules/slider.php
pagebuilder/pagebuilder.php
style.css