Sidebar menu space issue

[bjohansebas]

The sidebar menu used in the API takes up more space, making it impossible to use the link to the terms of use and privacy policies.

[devgar]

There's a jQuery bind managing this menu size, as it is intention to remove all jQuery #1569, to fix this issue Instead of VanillaJS I propose to use CSS. I've experimented a bit with calculated height and scroll animation

ExpressIssue.mp4

[bjohansebas]

@devgar oh great, can you open a PR? So we can test it.