Multiple bug fixes

【Contents of the fix】
■Fixed a bug that the theme options were not loaded when the site language was set to English in Settings.
■Fixed a bug in the WCEX Widget Cart plugin.
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change support

The following files have been modified for this update.
【Modified file】
admin/inc/basic.php
js/functions.js
style.css
template-parts/sns-btn-btm.php
template-parts/sns-btn-top.php