Icons being printed

Hi there!

I’ve discovered that on my site (pretty vanilla twenty nineteen) and others, Meow Lightbox will in some situations append all its UI icons to any pages of the WP frontend when printed. Hugely, at one icon per page.

This fixes it:

/* meow gallery printing giant icons fix */
@media print {
div.mwl-fullpage-container {
display: none;
}
}
/* hopefully not needed in future */