This widget has for purpose to quit the SYRTHES Graphical User Interface. If no save action has been done by users, a pop up window 
opens to propose to save the SYRTHES ASCII file.
This action can be done, either by using this widget or choosing "Quit" in the menu "File/Quit".
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 SYRTHES version   : VERSION_SYRTHES
 Name help file  : action_Quit.html
 I. Rupp, C. Peniguel  -  may 2014
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