Tweak first contributor message
While we wait for #181
We already know whether a MR is a contributor's first for that project. With this, we can already start making changes to communicate differently to that contributor.
The downside of this is that it is project specific - a contributo who has contributed many times to one project will get some custom 'first contribution' messaging upon their first contribution to another project.
This can be achieved by looking at the MR api for the field:
"first_contribution": true,
Edited by Raimund Hook