Fixing the GtkFileChooser is not the main problem, it is getting your patches merged. Someone from the Gtk team needs to review them and put their stamp of approval on them. But the Gtk team are RedHat employees and they prioritize whatever the company wants them to prioritize. And if the company doesn't want them to prioritize the GtkFileChooser, your patches will languish on their bug tracker. If you are lucky, you'll get a message two years after you uploaded them asking you to rebase them to HEAD because the code base has changed to much that your patches can't be merged without them being significantly reworked.