## Problem

- Server side validation is cumbersome to set up
- When using middlewares and as the SaveButton relied on the SaveContext.saving prop, the SaveButton was only disabled for while the main mutation was loading. However, additional work may still be running.

## Solution

For `pessismistic` mode only, we now transparently support server side validation. When a server validation occurs, the DataProvider should throw a ServerValidationError that contains an `errors` object matching the form shape.

Besides, we now await the mutation in `useCreateController` and `useEditController`. In `pessimistic` mode, that means the `SaveButton` will stay disabled until the mutation is resolved including its middlewares if any.

That does not change anything for the other mutation modes.

Co-authored-by: Gildas Garcia <1122076+djhi@users.noreply.github.com>

## Problem
There is now easy way to implement cumulative filters (filtering by multiple tags for instance) without reimplementing  `<FilterListItem>`.

### Solution
Introduce two new props:
- isSelected: accept the item value and the current filters and return a boolean
- toggleFilter: accept the item value and the current filters and return new filters

Co-authored-by: Jean-Baptiste Kaiser <jb@marmelab.com>

Co-authored-by: Gildas Garcia <1122076+djhi@users.noreply.github.com>

…-customization

Allow to customize how `<FilterListItem>` applies filters

Add server side validation support

Co-authored-by: Jean-Baptiste Kaiser <jb@marmelab.com>

Introduce withRefreshAuth

Improve AppBar Customization

…rray-input

Modifiable size prop for SelectArrayInput