[Website] Add score sorting by "last year/month/week" AND by view count

Website search really needs to have double search conditions.

That would be nice to show "only sheets that been uploaded for recent month" AND sort them by rating/views.
Currently only by-date sorting supported but it's pretty useless.

This double sort would show many recent interesting pieces, but with only "by-date" sorting too much irrelevant pieces comes to results.