I tried something like this once before and it didn't work, but for
whatever reason it does now.

VimwikiMakeLink() now draws from the list of existing vimwiki pages.
Ctrl-n / Ctrl-p draw from the list of all tags, which includes Pinboard
tags.

Arguably maybe these should use the same source.

This seems cool for focusing on prose / poetry / etc.

This involves changing grepprg, running, and then changing it back.

Not entirely optimal, but the location window has some good features.

Changes notes-links-for output to match (ish) grep format.

So as to have longer to type longer mappings.

Unclear whether this is causing a perceptible lag in running filters, but
maybe.