Correspondence to php7 and article type setting in quick edit

【Contents of the fix】
■Fixed to solve the error in php7 environment.
■Added the setting item of the recommended article to the post list screen > Quick Edit.

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

For more information, please visit the download site for purchasers of LUXE (tcd022).

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