New collapsing/expanding footer displays sites by catecories. E.g. Technology section is most solid and contains more then five columns each of them contains seven sites:
Other sections like Science have less items, only two non-full columns and more(10) link:
Seems there is possible to display all of science sites, so more link will not be actually needed.
Why the list of sites here is intentionally reduced? Is it possible to show all of them in this case?