Use outlined Material-UI variant for all inputs

ui/src/user/UserCreate.js

@@ -19,7 +19,7 @@ const UserCreate = (props) => {
   })
   return (
     <Create title={<Title subTitle={title} />} {...props}>
-      <SimpleForm redirect="list">
+      <SimpleForm redirect="list" variant={'outlined'}>
         <TextInput source="userName" validate={[required()]} />
         <TextInput source="name" validate={[required()]} />
         <TextInput source="email" validate={[required(), email()]} />

ui/src/user/UserEdit.js

@@ -38,7 +38,7 @@ const UserToolbar = (props) => (
 
 const UserEdit = (props) => (
   <Edit title={<UserTitle />} {...props}>
-    <SimpleForm toolbar={<UserToolbar />}>
+    <SimpleForm variant={'outlined'} toolbar={<UserToolbar />}>
       <TextInput source="userName" validate={[required()]} />
       <TextInput source="name" validate={[required()]} />
       <TextInput source="email" validate={[email()]} />

ui/src/user/UserList.js

@@ -12,7 +12,7 @@ import { useMediaQuery } from '@material-ui/core'
 import { List } from '../common'
 
 const UserFilter = (props) => (
-  <Filter {...props}>
+  <Filter {...props} variant={'outlined'}>
     <SearchInput source="name" alwaysOn />
   </Filter>
 )