SSL support / Multiple bug fixes

■SSL support for the “Google Custom Search” widget.
■Fixed a bug in the table function (TinyMCE’s table function) included in the visual mode of Classic Editor.
(Responding to the error that the URL to load the JavaScript file in question cannot be found)
■Fixed a bug in the Gutenberg editor (block editor) that prevented the image block from being centered.
■Fixed a bug in the Gutenberg editor (block editor) that caused the layout of the contributor column to be broken when the right-justified image block was placed at the end of the body text on the blog details page.

The following are the files that have been modified for this update.

【Modified files】
functions.php
languages/ja.mo
languages/ja.po
single.php
style.css
widget/google_search.php