This widget allows to activate the popup of a select file window to choose 
the name of a listing file.
 
Becarefull that if choosing an existing file in the list, 
then the previous listing 
file will be 
replaced.
 ________________________
 SYRTHES version   : VERSION_SYRTHES
 Name help file  : Ro_Ln_pb.html
 I. Rupp, C. Peniguel  -  may 2014
 ________________________