Multiple bug fixes

【Contents of fix】
■Fixed a bug where TCD theme options could not be saved if the visual rich editor was set to not be used.
■Fixed a bug that the search field does not show up if there is no input in the “Catchphrase” field of the top page and header content.
■Fixed an issue where the “Catchphrase” and “Description” of the custom post “Store” were not included in the search target.
■Fixed the site search function so that contents created with Page Builder are also searchable.
■Fixed a bug in which the preview did not work properly on pages using Page Builder.
■Adjusting the design style of the flag icons in the header language links

The following files have been modified for this update.
【Fixed files】
admin/theme-options.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/pagebuilder.php
functions.php
header.php
style.css