User group management : label changes

When user enters few letters in "rechercher des utilisateurs" he gets the list of users in frame " résultats de la recherche" : for each user there's an action ( a link) "ajouter à la selection" : this link should be called " Ajouter au groupe"

In the frame on the right listing the users of the groupe the title is "utilsiateurs selectionnés" , it should be " Membres du groupe" : For each group member, the action " Enlever de la selection" should be " Retirer du groupe"

The button " Vider la selection" shall be renamed " Retirer tous les membres"

We need to make sure that it'll only be impacting the group modification interface, not the others ( rights management interface etc.) that uses the same widgets