Multiple bug fixes

【Contents of the fix】
■Fixed a bug that the mega menu may not be displayed correctly in WordPress 5.6.
■Fixed an error related to the login judgment in the comment section.
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change support
■Removed “Google+” from the social button settings.
■Optimized OGP tags.
■【Mac】Fixed a bug in which the thickness of Japanese and European text may be displayed differently when using some fonts.

The following are the files that have been fixed in this update.

【Modified file】
admin/css/editor-style-02.css
admin/inc/basic.php
admin/theme-options.php
comments.php
functions/head.php
functions/ogp.php
functions/seo.php
js/functions.js
pagebuilder/assets/css/pagebuilder.css
style.css
template-parts/sns-btn-btm.php
template-parts/sns-btn-top.php