Set defaults for name_filter

jsx/src/Store.js

@@ -14,7 +14,7 @@ export const reducers = (state = initialState, action) => {
       return Object.assign({}, state, {
         user_page: action.value.page,
         user_data: action.value.data,
-        name_filter: action.value.name_filter,
+        name_filter: action.value.name_filter || "",
       });
 
     // Updates the client group model data and stores the page

jsx/src/util/withAPI.js

@@ -4,7 +4,7 @@ import { jhapiRequest } from "./jhapiUtil";
 const withAPI = withProps(() => ({
   updateUsers: (offset, limit, name_filter) =>
     jhapiRequest(
-      `/users?offset=${offset}&limit=${limit}&name_filter=${name_filter}`,
+      `/users?offset=${offset}&limit=${limit}&name_filter=${name_filter || ""}`,
       "GET"
     ).then((data) => data.json()),
   updateGroups: (offset, limit) =>