Page indicator for leaderboards

[Repr-dev]

At the moment, it is impossible to tell which page of monkeytype.com/leaderboards you are on just from the content of the page.
Users would benefit from a page indicator next to the page control buttons.

While the page number is visible in the URL parameters, many (or, perhaps, most) people don't know to look there for information. I myself have been in web dev for a long time and it took me a while to realize I could find the Leaderboards page number in the URL.

Seems like a pretty simple job, which is part of why I'd like to make this contribution myself. It'd also be my first open source contribution.

Concept (made with Chrome Inspector):