Paginate judgehost page

[vmcj]

When visiting: https://onlinejudge.icpc.global/jury/judgehosts/1 with more than 2000 submissions handled the page is slow, we should do a similar thing to the general submission page and only display the last n entries to make the pageload time consistent and not dependent on the number of submissions in the contest.

[meisterT]

We probably should think about pagination in general, also on the general submission page.