Fixed multiple bugs / Added new features

【Contents of fixes】
■Fixed a bug where an error could occur when installing a theme.
■Fixed a bug in which URLs were sometimes displayed beyond the width of the content on smartphones.
■Added “Display settings on ranking page” option.
　※If this setting is checked, the article will not be displayed on the ranking page.
■Fixed a bug that an error may occur when previewing pages using Page Builder in WP5.2 or later.

The following files have been fixed for this update.
【Fixed files】
functions/head.php
functions/quick_edit.php
languages/ja.mo
languages/ja.po
pagebuilder/pagebuilder.php
functions.php
page-ranking.php
style.css

【Added files】
functions/blog_cf2.php

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