Upgrade react-admin to version 5 (#40)

* wip on ra upgrade

* Finish upgrade

* fix package.json

* pr fixes

* more pr fixes

* update readme

src/resources/users.tsx

@@ -287,15 +287,19 @@ export const UserEdit = (props: EditProps) => {
   const translate = useTranslate();
 
   return (
-    <Edit {...props} title={<UserTitle />} actions={<UserEditActions />}>
+    <Edit {...props} title={<UserTitle />} actions={<UserEditActions />} mutationMode="pessimistic">
       <TabbedForm toolbar={<UserEditToolbar />}>
         <FormTab label={translate("resources.users.name", { smart_count: 1 })} icon={<PersonPinIcon />}>
           <AvatarField source="avatar_src" sortable={false} sx={{ height: "120px", width: "120px" }} />
           <BooleanInput source="avatar_erase" label="resources.users.action.erase_avatar" />
-          <ImageInput source="avatar_file" label="resources.users.fields.avatar" accept="image/*">
-            <ImageField source="src" title="Avatar"  />
+          <ImageInput
+            source="avatar_file"
+            label="resources.users.fields.avatar"
+            accept={{ "image/*": [".png", ".jpg"] }}
+          >
+            <ImageField source="src" title="Avatar" />
           </ImageInput>
-          <TextInput source="id" disabled />
+          <TextInput source="id" readOnly />
           <TextInput source="displayname" />
           <PasswordInput source="password" autoComplete="new-password" helperText="resources.users.helper.password" />
           <SelectInput source="user_type" choices={choices_type} translateChoice={false} resettable />