Fixed a bug in the footer bar and added a setting item for smartphones

【Contents of the fix】
■Fixed a bug in the fixed footer bar for smartphones that prevented the SNS icon from being displayed when the share button was tapped.
■Added a setting item for the display position of the header bar (for smartphones).

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
functions/head.php
style.css
【Added files】
img/common/facebook.png
img/common/line.png
img/common/twitter.png

For more information, please visit the IZM (tcd034) download site for purchasers.