Fixed multiple bugs

【Contents of fix】
■Fixed a bug that the header text color of the blog archive page is not reflected.
■Fixed a bug that the contents of the “Menu” custom post type’s detailed article page and fixed page are not displayed correctly when using “Mega Menu A”.
■Fixed the bug that the page settings are not reflected correctly when creating fixed pages with “Default Template” or “Page without Sidebar”.

The following are the files that have been modified for this update.
【Modified file】
functions/head.php
functions/menu.php
page-noside.php
style.css