Return a string instead of an array for label in questiionnaire list
Return a string instead of an array for label in questiionnaire list

When we ask for a questionnaire, the server returns the label of the questionnaire  as an array of strings, but when it returns a questionnaire list, it has to return the label of each questionnaire as a string.
InseeFr/Pogues,Zenika/Pogues,Zenika/Pogues,Zenika/Pogues,InseeFr/Pogues,InseeFr/Pogues