Visually Freeze the Links for Vertical Scrolling

[joehagmann]

(does not need to be implemented in the 'manuscript version')
When scrolling down so that the links on top disappear, the view is difficult to read. One solution would be to freeze the links so that you cannot scroll them away.
Optimally, for later, those links that are not used by the subset of visible paths could disappear.

[josiahseaman]

I was thinking the same thing. They can stay attached to the top of the browser window and only scroll the Matrix.

[josiahseaman]

Could become higher priority if there's a large number of COVID19 rows to display (likely).

[CrookedY]

I am happy to pick this up

[joehagmann]

with the git commit 9dd5411, I get the following bug: if I scroll down, and scroll up again, the matrix can be scrolled 'behind' the link panel and shows up above it again (see the blue arrow):

I think this happens only to the right of the input fields that are on top