title: nano: update a file after selecting it using the file browser
body: <p>I have no problems when open+change+save a file if I write <code>nano filename</code> on the terminal.
  But if I open nano and open the File Browser and open a file and try to save it, there is no default file name!:</p>
  
  <p><a href="https://i.stack.imgur.com/h5QGv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/h5QGv.png" alt="enter image description here"></a></p>