Multiple bug fixes

【Contents of the fix】
■Fixed a bug where the impressions and conversions of the article CTA and footer CTA did not increase.
■Fixed and added descriptions of theme options.
■【Mac/Safari】Fixed a bug when playing modal video content full screen.
■Adjusted the style of blog categories in mobile environment.
■Fixed some minor bugs.

The following are the files that have been modified for this update.
【Modified file】
admin/inc/basic.php
admin/inc/blog.php
admin/inc/news.php
css/responsive.css
functions/cta.php
functions/footer-cta.php
languages/default.mo
languages/default.po
languages/ja.mo
languages/ja.po
style.css

【Added files】
js/jquery.inview.min.js