Multiple bug fixes

【Contents of the fix】
■Fixed a bug that caused some pages to move to the bottom of the page when the page was refreshed.
■Optimized OGP tags.

The following are the files that have been modified for this update.
【Modified file】
admin/theme-options.php
content-form.php
content-page.php
content-pagenoside.php
functions/ogp.php
functions/seo.php
functions/update_notifier.php
languages/ja.mo
languages/ja.po
page/template1.php
page/template2.php
page/template3.php
page/template4.php
single-staff.php
style.css

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