Modification of widgets and admin panel

【Contents of the fix】
■Fixed an error in the article list of the admin panel in PHP 5.6 or later.
■Fixed an issue where the article type was displayed in the “Thumbnail Article List (tcd version)” widget.

The files that have been modified for this update are as follows
【Corrected files】
functions.php
style.css
widget/styled_post_list4.php

For more information, please visit the VIEW(tcd032) download site for purchasers.