[Bug 35533] Make it possible to see the sent patch files inline without extra download step

https://bugs.winehq.org/show_bug.cgi?id=35533

--- Comment #3 from François Gouget  ---
I remember playing with the MIME type at the time to try and get the patch to
simply open in the browser as a text file but with the differing behavior
between browsers I could not obtain anything that made sense. Maybe someone
else would have more luck.

Another option, the one preferred by Dmitry I believe, would be to display the
patch inline in the page, something like click on the [+] and here's the patch.
That would require escaping. Bonus points for color highlighting and avoiding a
page reload. But there would still need to be a way to download the raw patch
so one can apply it locally.