Some fixes for the filters

[gwyneplaine]

• We now auto focus the first input in the dialog as per https://www.w3.org/TR/wai-aria-practices-1.1/#dialog_modal
• We now also update the filter on 'enter' keydown.

[changeset-bot]

🦋 Changeset detected

Latest commit: 817b8d7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@keystone-next/admin-ui	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/keystonejs/keystone-next-docs/4Fu9VgqiN1X4uBcYKXKwJ8WCezLe
✅ Preview: https://keystone-next-docs-git-fix-filters-keystonejs.vercel.app

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 817b8d7:

Sandbox	Source
@keystone-next/example-sandbox	Configuration

[gautamsi]

We were missing a filter is_null: true for all nullable field.

Can you add it if not already.
@timleslie @JedWatson

[JedWatson]

@gautamsi that's on our list, we're in the middle of a big change to fields that I've just written up here: #5635

As part of that, we're going to be updating filters across all our field types

[gautamsi]

I see big changes, thanks for the heads up

[emmatown]

Needs a changeset

[timleslie]

This all looks good 👍