Add create group / delete group functionality

jsx/src/components/Groups/Groups.js

@@ -21,7 +21,7 @@ const withGroupsAPI = withProps((props) => ({
     jhapiRequest("/groups/" + name + "/users", "DELETE", {
       body: { users: removed_users },
       json: true,
-    }),
+    })
 }));
 
 export default compose(