Multiple bug fixes

【Contents of the fix】
■Fixed the bug that the image set in the top page “Free Space” may be overflowed.
■Fixed the bug that the interview FAQ transition is not output only in PHP7.1 environment.
■Update of Page Builder

The following are the files that have been modified for this update.
【Fixed files】
languages/ja.mo
languages/ja.po
pagebuilder/pagebuilder.php
single-interview.php
style.css