Fixed a bug in the load screen.

【Contents of the fix】
■Fixed a bug where the page did not switch even after the load was completed if the load icon type was set to “Logo” or “Catchphrase” in the load screen settings.
■Fixed a bug in which the top page was sometimes shifted upward when “Slide up” was selected in “Animation after loading”.

【Modified files】
functions/footer_script.php
header.php
style.css