[Feature request] Backspace with empty string going upwards in path

[spiderbit]

if you open the filechooser and press without anything else backspace it should just go upwards in the file hierarchy so the same as currently hovering ".." and pressing enter.

The advantage is that you can hide ".." yet fast go upwards in file hierarchy, also it's the default behavior from the "find-file" command in emacs, the overlap between emacs users and rofi users should be pretty big.

It seems to be pretty easy to add if you know the source?

p.s.: I also have a guix package package file I could contribute to get it installed in guix, I just didn't look up how to contribute to guix yet.