[Docs website] "Versions" menu not scrollable, overflow preventing ability to close

[wackerow]

Description

Recently the https://docs.soliditylang.org website (with source inside the docs folder of this repo) underwent a design overhaul. Now that it's live, the "versions" menu in the lower left is populated with all of the old Solidity tags, causing a much larger list than in development, which overflows vertically preventing user from being able to toggle the menu closed again.

Environment

Issue unrelated to Solidity compiler, but is present on the docs website as of version v0.8.21.

Steps to Reproduce

1. Go to https://docs.soliditylang.org
2. Click on RTD Version menu in bottom left:

3. Note overflow, without scroll, and inability to close menu without refresh

Additional info

Will begin working on a patch for this today.