Multiple bug fixes

【Contents of the fix】
■Fixed a bug where h1 did not exist on the top page.
■Fixed so that content created with Page Builder can be searched with the Site Search function.
■Fixed a bug that the setting of Appearance > TCD Theme Options > Top Page > Carousel Slider > Display Settings “Show the number of views” is not reflected.
■Fixed a bug that the centering of image blocks is not reflected in the Gutenberg editor.
■Support SSL.
■Support for WP5.1.1

The following files have been modified for this update.
【Fixed files】
admin/inc/basic.php
functions.php
header.php
languages/ja.mo
languages/ja.po
pagebuilder/assets/admin/css/admin.css
pagebuilder/assets/admin/js/admin.js
pagebuilder/assets/css/googlemap.css
pagebuilder/modules/includes/slick.php
pagebuilder/modules/slider.php
pagebuilder/pagebuilder.php
style.css
template-parts/index-slider.php
widget/google_search.php

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