Multiple bug fixes

【Contents of the fix】
■Fixed an error related to the login judgment in the comment section.
■Corresponded to the specification change of social button type 5 (official button) “Facebook Like Button”.
■Removed “Google+” from the settings of social buttons that are no longer in service.
■【Mac】Fixed a bug in which the thickness of Japanese and European text may be displayed differently when using some fonts.
■Optimized OGP tags.
■Updated Page Builder.
・【Firefox, IE】 Fixed the problem that Google map is unstable.
・Fixed an issue with the editor switching in WordPress 5.5 and adjusted the CSS.
・Fixed a bug that the checkbox of the block border was removed when duplicating a block.
・Fixed other minor bugs.
■Added explanatory text in theme options.

The following files have been modified for this update.

【Modified file】
admin/css/editor-style-02.css
admin/theme-options.php
comments.php
functions/ogp.php
functions/seo.php
header.php
languages/ja.mo
languages/ja.po
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/js/admin.js
pagebuilder/assets/css/pagebuilder.css
pagebuilder/modules/googlemap.php
pagebuilder/modules/simple_table.php
pagebuilder/modules/slider.php
pagebuilder/pagebuilder.php
style.css
template-parts/sns-btn-btm.php
template-parts/sns-btn-top.php