We have (fairly mediocre, but hopefully improvable) edit type documentation, but the edit sidebar when looking at one edit only links to the generic list at https://musicbrainz.org/doc/Edit_Types (even though we most definitely know the specific type and could link to its own doc page). Also, when looking at a list of edits in search or on /open_edits or whatnot, no link to docs is present at all since there's no sidebar.

We should probably link to the doc page directly, and not from the sidebar, but from the edit content, so that it's available on every edit view. Possibly a small (documentation) link by the header, such as "Edit #9911133 - Remove disc ID (pre‐NGS) (documentation"?