Adapting to php7 and adding items to quick edit and adjusting the menu

【Contents of the correction】
■Fixes to resolve errors in php7 environment.
■Added the setting item of the recommended article to the post list screen > quick edit.
■Fixed a bug in which the user may be redirected to a different page when tapping the sub menu of the global menu on the iPhone.

The following files have been modified for this update.
【Corrected files】
admin/theme-options.php
functions.php
photek.css
style.css
【Added files】
functions/quick_edit.php

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

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