This button is used to open/collapse a specific text field 
in which users can write a text providing detailed explanations
about the solid faces to be coupled with radiation.
 
It is often a good idea to spend some time to 
describe what references correspond to what part of the solid,
especially when dealing with complex cases 
with numerous references.
 
The text will NOT be interpreted by SYRTHES, but will be 
dumped as comments in the ASCII SYRTHES parameter file.
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 SYRTHES version   : VERSION_SYRTHES
 Name help file  : pushButton.html
 I. Rupp, C. Peniguel  -  may 2014
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