Fixed a problem with Retina support for logo images

【Contents of the fix】
■Fixed a bug in Ver. 2.4 regarding Retina support for logo images.

The following are the files that have been fixed for this update.
【Corrected files】
footer.php
Functions/header-logo.php
mobile/footer.php
style.css

For more information, please visit the download site for purchasers of LAW (tcd031).