investigate optimizing page size after tooltips feature

[tayloraswift]

the tooltips feature is hugely valuable, but it is also increasing our page sizes significantly: by a factor of 2x in some cases. for example, the page https://swiftinit.org/docs/swift-syntax/swiftsyntax was about 250KB before the change; it is now clocking in at nearly 500KB!

we need to figure out a way to either bring down these page sizes, or make the site’s firewall even more aggressive to compensate.