- BUGS
  1- After fitting, the fit panel is not updated with the output values of the fit.
  2- Do this:
      a) load a file
      b) fit a straight line
      c) change the scale using the "Properties" menu. 
      You will see an exception that should be fixed.



- IMPROVEMENTS
  1- After loading a new file or changing the scale using the "Properties" menu, remove any previously displayed fit from the graph.