Navigation with left/right arrow keys

[yckart]

It would nice to be able to navigate the tree up/down with left/right keys (like in google chrome super+left, goes one history entry back). This way we don't need to go back to top (..) to navigate back.

I tried something like this, but it just sends me to the st application directory:

{
  "keys": ["alt+left"],  "command": "file_navigator",
  "context": [{ "key": "file_navigator_do_directory" }], "args": { "path": "../" }
}