CEA creates a file without warning the user

[Francisco Javier Díez]

When performing CEA on an influence diagram (for example, http://www.probmodelxml.org/networks/id/ID-CEA-test-2therapies.pgmx), OpenMarkov creates a file CEAnalysis.txt without warning the user. This should not be done.

The correct way of allowing the user to save the results of the analysis would be to have a copy and/or save button in the window that shows the results.