Create a similar donation banner (from about:tor) to torproject.org homepage

Last Tor Browser release came with a banner for our crowdfunding campaign [see attached screenshots].

You can find the code for it here: https://github.com/arthuredelstein/torbutton/commit/unified-banner-patch

We would like to have these banners (if possible with the rotation like we did for TBB) at the torproject.org homepage only.

Thanks!