Currently when focused on the browser, up and down move the file cursor, but left and right move the transport marker back in the session. This is counterintuitive because when user is focused on browser all of the arrow keys (left, right, up, and down) should correspond to browser operations.
Similar to Ableton, when navigating files in browser, back arrow should move up the parent folder. Back arrow again should close the parent folder. Forward arrow on a closed folder should open the folder.