Multiple bug fixes

【Contents of the fix】
■Fixed a bug in which the text color of the heading of “Related Articles” in the “Column” detail page was not reflected.
■Fixed the bug that meta title is not output.
■Fixed a bug where the blog body would not display properly on the archive page when the number of characters was small.
■Fixed an error in the description of the style sheet for smartphones.
■Adjusted the display specification of the top page “Box contents”.
■Adjusted the style of “Clinic” archive page title for tablet size.
■Added “Show Thumbnails” option to the detail page display settings of the theme options “Services”, “Staff”, “Column”, “Campaign”, and “Clinic”.
■Updated the page builder.
 ※With this update, the page builder is not displayed in “FAQ”.

The following files have been modified for this update.
【Corrected files】
admin/inc/campaign.php
admin/inc/clinic.php
admin/inc/service.php
admin/inc/staff.php
css/responsive.css
functions/head.php
functions/seo.php
languages/ja.mo
languages/ja.po
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/js/googlemap.js
pagebuilder/assets/css/googlemap.css
pagebuilder/assets/css/pagebuilder.css
pagebuilder/assets/css/slider.css
pagebuilder/modules/catchcopy.php
pagebuilder/modules/googlemap.php
pagebuilder/modules/headline.php
pagebuilder/modules/image.php
pagebuilder/modules/includes/slick.php
pagebuilder/modules/simple_table.php
pagebuilder/modules/slider.php
pagebuilder/modules/tab.php
pagebuilder/pagebuilder.php
front-page.php
page.php
single-campaign.php
single-clinic.php
single-column.php
single-news.php
single-service.php
single-staff.php
style.css