further fixes for 'RECENT' files panel in filebrowser:
* Also add the recent folder at the head if it is not yet in the list
* since we now insert at the head, we need to remove the skipping of the first entries if there are too many. Now correctly leaving the last elements unwritten.
* Another consequence of inserting at the head is that we don't want to reverse the list in the recent panel anymore - got rid of the corresponding code.