Redesign contributor credits

[TheLastProject]

Right now, About -> Credits shows the list of contributors sorted by amount of commits. This is somewhat suboptimal.

First off, it uses the commit or GitHub name, which may not be the name people prefer using.
Secondly, because it only shows people who made at least 5 commits, code contributors who committed big meaningful changes/fixes in a low amount of commits are shown further down the list or sometimes not even at all.
Thirdly, people who contribute in other meaningful ways that doesn't end up in the code are not shown.

Maybe we should redesign this screen, to make it clearer what people did and also to allow non-code contributions (and donations) to be shown and let people choose if they want to be displayed and with which name.

We should think a bit about how we want this to look and how we make sure people don't get upset when cleaning this (perhaps we should email every contributor to see if they want in? Sounds like it could be considered spam though...)

(Originally suggested by @kompowiec in the Catima Matrix chat)