Redmine

I'm curious if there is an official process for getting things into core Redmine. There are a handful of things I may try to tackle in the coming months now that I'm going to be committing to using Redmine and I'd like to think that some of the changes I might make could eventually make it into Redmine itself so I will not have to maintain my changes in my own fork indefinitely.

After seeing the likes of #2277 it makes me wonder if there is a process for making these types of requests? This seems like a relatively trivial (but important) fix that could have been added to core at any point over the last two years. What is missing that would get a patch like this submitted to core Redmine?