Fixed several bugs and added a sidebar background color setting item

【Contents of fix】
■Fixed a bug that caused unnecessary spaces to appear in the fixed page template depending on the content setting status.
■Fixed a bug in the fixed page template “About” to solve the notice error displayed when no image is set.
■Added “Fixed sidebar background color” setting item to Theme Options > Basic Settings.
■Fixed a bug that the setting of “Font Color” in Theme Options > Fixed Sidebar > Global Menu Settings is not reflected.
■Fixed the bug that the hover style is displayed by tapping the button on the top page scrolling content (when viewed on a smartphone) when there is no button setting.

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
functions/head.php
languages/ja.mo
languages/ja.po
page/template_about.php
page/template_staff.php
responsive.css
style.css

For more information, please visit the AVALON (tcd040) download site for purchasers.