Show save button only when modifications are made

geneit_app/src/routes/family/FamilyMemberRoute.tsx

@@ -186,6 +186,7 @@ export function MemberPage(p: {
 
   const cancel = async () => {
     if (
+      changed &&
       !(await confirm(
         "Voulez-vous vraiment retirer les modifications apportées ? Celles-ci seront perdues !"
       ))
@@ -240,9 +241,9 @@ export function MemberPage(p: {
           )}
 
           {/* Save button */}
-          {p.editing && (
+          {p.editing && changed && (
             <Button
-              variant="contained"
+              variant={"contained"}
               startIcon={<SaveIcon />}
               onClick={save}
               size="large"