Fixed multiple bugs and adjusted display style

【Contents of the fix】
■Fixed an issue where an error would be displayed when deleting an ad on the photo page.
■Fixed a problem with the category display on the photo page.
■Fixed the URL of the link destination of the category name in the fixed page for gallery.
■Adjusted multiple display styles.

【Added features】
■Added Google custom search function setting item (for search form in header) to theme options.
■Added support for displaying images in the right column of the photo page.
※In the photo page, all images are displayed in the left column, and only text is displayed in the right column.
However, by adding the “show_at_right” class to the image, it is now possible to display images in the right column as well.

The following files have been modified to reflect this update.
【Corrected files】
admin/theme-options.php
content-portfolio-main.php
content-blog-main.php
header.php
page-portfolios.php
searchform.php
single-portfolio.php
single.php
google_search.php
content-portfolio-index.php
photek.css
style.css

For more information, please visit the PHOTEK (tcd024) download site for purchasers.