better error management needed when writing tandem preset

Crash when an error occurs writing tandem preset.

Oops! an error occurred in XTPcpp. Dont Panic : error writing tandem preset file /gorgone/pappso/moulon/users/Olivier/20190612_essai_DIA_Aaron/preset_tandem/QExactive_analysis.xml : error : cannot open the XML X!Tandem parameter file : /gorgone/pappso/moulon/users/Olivier/20190612_essai_DIA_Aaron/preset_tandem/QExactive_analysis.xml

May be fixed by adding exception catcher.