Adjustment of display when responsive is off and modification of some codes

【Contents of the correction】
■Adjusted the display when the responsive display is set to OFF.
■Fixed a mistake in the markup in archive-news.php.

The following files have been modified for this update.
【Corrected files】
archive-news.php
footer.php
functions.php
functions/head.php
header.php
index.php
js/jscript_no_responsive.js
sidebar.php
single-product.php
single.php
ns_btn_btm.php
style.css

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