Normalize leaderboard page

[ruilopesm]

Make the picker be the same as the one used on the landing and make the current day text and "All time" text have the same size.

[ShashwatPS]

Hey I would like to work on this issue but unable to find the Leaderboard's page can you specify exactly where is it present ?

[ruilopesm]

@ShashwatPS You can find this page's component in layout/shared/Leaderboard/Leaderboard.tsx.