Multiple bug fixes

【Contents of the fix】
■【iPad】 Fixed the layout of the next and previous article links when viewing in portrait mode on iPad.
■Support jQuery ver1.8 specification change.
■Fixed a bug that some items in the theme options were being translated without permission.
(Top page > Header slider settings > Text to be displayed on buttons)
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change support
■Removed “Google+” from the social button settings.
■Fixed an error regarding the login judgment in the comment section.
■【Mac】Fixed a bug in which the thickness of Japanese and European text may be displayed differently when using some fonts.
■Optimized OGP tags.

The following files have been modified in this update.

【Modified file】
admin/js/cf-media-field.js
admin/js/my_script.js
admin/theme-options.php
comments.php
editor-style-02.css
functions/head.php
functions/ogp.php
functions/seo.php
pagebuilder/assets/admin/js/admin.js
pagebuilder/assets/admin/js/editor.js
pagebuilder/assets/admin/js/repeater.js
pagebuilder/assets/admin/js/simple_table.js
pagebuilder/assets/admin/js/slider.js
pagebuilder/assets/css/pagebuilder.css
responsive.css
sns_btn_btm.php
sns_btn_top.php
style.css