do not allow change user name field on edit

scm-ui/src/users/containers/UserForm.js

@@ -9,7 +9,6 @@ import Loading from "../../components/Loading";
 type Props = {
   submitForm: User => void,
   user?: User,
-  loading?: boolean,
   t: string => string
 };
 
@@ -39,14 +38,20 @@ class UserForm extends React.Component<Props, User> {
   render() {
     const { t } = this.props;
     const user = this.state;
-    if (user) {
-      return (
-        <form onSubmit={this.submit}>
+
+    let nameField = null;
+    if (!this.props.user) {
+      nameField = (
         <InputField
           label={t("user.name")}
           onChange={this.handleUsernameChange}
           value={user ? user.name : ""}
         />
+      );
+    }
+    return (
+      <form onSubmit={this.submit}>
+        {nameField}
         <InputField
           label={t("user.displayName")}
           onChange={this.handleDisplayNameChange}
@@ -73,15 +78,9 @@ class UserForm extends React.Component<Props, User> {
           onChange={this.handleActiveChange}
           checked={user ? user.active : false}
         />
-          <SubmitButton
-            label={t("user-form.submit")}
-            loading={this.props.loading}
-          />
+        <SubmitButton label={t("user-form.submit")} />
       </form>
     );
-    } else {
-      return <Loading />;
-    }
   }
 
   handleUsernameChange = (name: string) => {