Fixed multiple bugs / WP5.1.1 compatible

【Contents of the fix】
■Added support for WordPress 5.1.1 (Gutenberg).
■Fixed a bug in the theme option “Business Day Table Display Settings” that occurs when 0 is entered as the target page ID.
■Fixed OGP setting to support the new Facebook specification instead of the old one.
■Fixed an error in the description of the OGP output content.

The following files have been modified for this update.
【Corrected files】
admin/js/my_script.js
admin/theme-options.php
fonts/design_plus.eot
fonts/design_plus.svg
fonts/design_plus.ttf
fonts/design_plus.woff
functions.php
functions/ogp.php
languages/ja.mo
languages/ja.po
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/css/media-field.css
pagebuilder/assets/admin/css/repeater.css
pagebuilder/assets/admin/js/admin.js
pagebuilder/assets/admin/js/editor.js
pagebuilder/assets/admin/js/googlemap.js
pagebuilder/assets/admin/js/media-field.js
pagebuilder/assets/admin/js/repeater.js
pagebuilder/assets/css/pagebuilder.css
pagebuilder/assets/css/slider.css
pagebuilder/assets/css/tab.css
pagebuilder/assets/js/tab.js
pagebuilder/modules/attendance_table.php
pagebuilder/modules/business_day.php
pagebuilder/modules/catchcopy.php
pagebuilder/modules/editor.php
pagebuilder/modules/googlemap.php
pagebuilder/modules/headline.php
pagebuilder/modules/image.php
pagebuilder/modules/includes/media_field.php
pagebuilder/modules/slider.php
pagebuilder/modules/tab.php
pagebuilder/pagebuilder.php
style.css

【Added files】
pagebuilder/assets/admin/js/simple_table.js
pagebuilder/assets/admin/js/slider.js
pagebuilder/assets/admin/js/tab.js
pagebuilder/assets/css/googlemap.css
pagebuilder/assets/css/simple_table.css
pagebuilder/assets/js/googlemap.js
pagebuilder/modules/includes/hex2rgb.php
pagebuilder/modules/includes/slick.php
pagebuilder/modules/includes/theme_options.php
pagebuilder/modules/simple_table.php

【Deleted files】
pagebuilder/assets/admin/js/jscolor.js
pagebuilder/assets/img/slider_arrow1.png
pagebuilder/assets/img/slider_arrow2.png
pagebuilder/modules/includes/jscolor.php

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