Prevent records and rankings from reloading automatically every time you change a filter

[zeecho]

Currently the records and rankings pages automatically reload when you change a filter (switching from single to average, changing the event, changing the country/continent, etc.). However, I'd say most of the time we want to change several filters and it's frustrating to have to wait for some useless rendering while you are selecting your filters. I think it would be more user friendly to let the user submit the filters once they selected what they want ( = similarly to the old PHP pages).

(Of course, apart from that those pages are way better now :))