Multiple bug fixes

【Contents of the fix】
■Adjusted the layout of the “Related Article Card Link” quick tag.
■Fixed an issue where “Sold Out” was displayed for products that were in stock in the “Welcart Keyword Search” widget’s “Combined Product Category Search” when viewed on a smartphone.
■Adjusted the style of the header.
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change.
■Removed “Google+” from the social button settings.

The following files have been modified for this update.

【Added files】
functions/card-link.php

【Modified file】
admin/img/share_type1.jpg
admin/img/share_type2.jpg
admin/img/share_type3.jpg
admin/img/share_type4.jpg
admin/img/share_type5.jpg
admin/inc/basic.php
admin/theme-options.php
functions.php
js/functions.js
style.css
template-parts/sns-btn-btm.php
template-parts/sns-btn-top.php
wc_templates/wc_search_page.php