Fixed multiple bugs and added functions

【Contents of fixes and feature additions】
■Added OGP setting function to theme options (Facebook/Twitter)
■Added the article type “Recommended article 3”.
■Changed the wording of the original widget “Advertisement” setting item.
■Fixed a bug that the side menu button does not open and close when tapped on iPad.
■Improved global menu display on tablet size.

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
focus.css
footer.php
functions.php
functions/recommend.php
header.php
languages/ja.mo
languages/ja.po
sidebar.php
style.css

For more information, please visit the FOCUS (tcd030) download site for purchasers.