Updated fixed footer bar and fixed bugs in some environments

【Contents of fixes and function additions】
■Updated the fixed footer bar for smartphones.
■Fixed a bug that the previous post and next post links at the bottom of the blog post detail page were displayed in duplicate in some server environments.
■Fixed structured markup in the breadcrumb list.

The following files have been modified for this update.
【Corrected files】
admin/css/my_admin.css
admin/theme-options.php
agent.css
breadcrumb.php
content-single.php
footer-bar/footer-bar.css
footer-bar/footer-bar.js
footer-bar/footer-bar.php
footer.php
functions.php
functions/seo.php
header.php
languages/ja.mo
languages/ja.po
【Added files】
footer-bar/footer-bar2.js
img/common/facebook.png
img/common/line.png
img/common/twitter.png

For more information, please visit the AGENT (tcd033) download site for purchasers.