Multiple bug fixes / specification changes and feature additions

【Contents of fixes】
【Common to both Welcart and WooCommerce versions】
■Fixed a bug that the layout of the 8 block contents on the top page was broken in certain window sizes.
■Changed the wording displayed when there are no products on the wishlist (There are no products on the wishlist.) (TCD theme > Products > Display Settings > Wish List Title is now applied to the “Wish List” part of “There are no products on the wish list.)
■Added “Ranking days range” item to the fixed page template “Ranking” of WooCommerce version.
(Changes have been made to the file shared with the Welcart version, so the changes are common to both versions.)
■Added “Custom CSS”, “Custom Script”, and “SEO Settings (meta tags)” functions to the individual page edit screen (posts, custom posts, and fixed pages).
■Updated the page builder to support WordPress 5.5.

【Welcart version】
■Fixed a bug that the quantity of products could not be changed on the cart page when viewed from a smartphone.

【WooCommerce version】
■Updated WooCommerce template files.
■Fixed a bug where the content of the fixed pages would not be displayed when “Optimize CSS Code” was selected in the theme options for speedup.

The files that have been modified for this update are as follows.
【Common to both Welcart and WooCommerce versions】
【Modified file】
comments.php
functions.php
functions/custom-css.php
functions/head.php
functions/page-ranking-cf.php
functions/update-notifier.php
js/front-page.js
languages/ja.mo
languages/ja.po
page__ranking.php
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/js/admin.js
pagebuilder/assets/admin/js/editor.js
pagebuilder/assets/admin/js/repeater.js
pagebuilder/assets/admin/js/slider.js
pagebuilder/pagebuilder.php
style.css
template-parts/footer-instagram.php
wishlist.php

【Added files】
functions/custom-script.php

【Welcart version】
【Modified file】
css/welcart.css

【WooCommerce version】
【Modified file】
functions/woocommerce.php
woocommerce/cart/cross-sells.php
woocommerce/myaccount/dashboard.php
woocommerce/order/order-details.php