if I have a couple python files in a directory with many html and php files, "All Sources" doesn't really help.
OK. Even if the Gtk scrolling issue was resolved on your system, I assume you'd still want to configure the list of file filters. ATM you can't do that. My idea would allow you to change the order:
the single-filetype file filters could be ordered to show filetypes that don't belong to a group above the grouped ones.
So *if* this was implemented, you might define: `None=HTML;PHP;Python`
Then the list would be something like: All files All source HTML PHP Python Abc Assembler C C++ D etc
@Rufusvs would that solve the issue?