If in farm mode, force the sorting direction to be reversed
So in an ideal scenario, the newest file is first. This of course breaks as soon as a file is deleted/renamed/moved, but it should at least be fixed now compared to before where the direction could be influenced by a disabled setting
_md->row = -1; // assume that no SD file/dir is currently selected. Once they are rendered, it will be changed to the correct row for the _scrolling state.