Hi,
I user header builder of PRO, but I see when the page is loading, before the header that is created by PRO being loaded, a white square is trying to load, and that causes some freeze at the beginning of page loading.
Any idea what that square is and how can I avoid that from being loaded?

Also, I can’t figure out what is the usage of this file for the theme/site, but it is loading and seems like useless which can be removed to improve optimizations:
https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.3/themes/smoothness/jquery-ui.css
any idea how to remove this? and if its ok to remove at all?
Thanks