Add confirmation when deleting user

ui/src/user/UserEdit.js

@@ -1,4 +1,5 @@
 import React from 'react'
+import { makeStyles } from '@material-ui/core/styles'
 import {
   TextInput,
   BooleanInput,
@@ -9,17 +10,35 @@ import {
   email,
   SimpleForm,
   useTranslate,
+  Toolbar,
+  SaveButton,
 } from 'react-admin'
 import { Title } from '../common'
+import DeleteUserButton from './DeleteUserButton'
+
+const useStyles = makeStyles({
+  toolbar: {
+    display: 'flex',
+    justifyContent: 'space-between',
+  },
+})
 
 const UserTitle = ({ record }) => {
   const translate = useTranslate()
   const resourceName = translate('resources.user.name', { smart_count: 1 })
   return <Title subTitle={`${resourceName} ${record ? record.name : ''}`} />
 }
+
+const UserToolbar = (props) => (
+  <Toolbar {...props} classes={useStyles()}>
+    <SaveButton />
+    <DeleteUserButton />
+  </Toolbar>
+)
+
 const UserEdit = (props) => (
   <Edit title={<UserTitle />} {...props}>
-    <SimpleForm>
+    <SimpleForm toolbar={<UserToolbar />}>
       <TextInput source="userName" validate={[required()]} />
       <TextInput source="name" validate={[required()]} />
       <TextInput source="email" validate={[email()]} />