Multiple bug fixes

【Details of fixes】
■【Mac】Fixed a bug in which the thickness of Japanese and European characters may be displayed differently when using some fonts.
■Fixed a bug that the font size and color settings of loading messages are not reflected.

The following are the files that have been modified for this update.
【Modified file】
functions.php
functions/head.php
pagebuilder/assets/css/pagebuilder.css
style.css