Arch: converted Dropdown to a functional component utilizing react-popper

[Vultraz]

As says. Includes a fix to withModalHandlers where mode wasn't being passed to the wrapped component.

Once there's a proper contextmenu usecase for Dropdown I'll be able to test whether that positioning works properly. I'm honestly not sure what that's supposed to look like. Because of the aforementioned bug with mode, the component was always using the contextmenu case in calculatePosition. That case is now handled with click, so I don't know what contextmenu is supposed to look like.

Includes some minor code cleanup to Popout.

[changeset-bot]

🦋 Changeset is good to go

Latest commit: 163ca9a

We got this.

This PR includes changesets to release 7 packages

Name	Type
@arch-ui/dropdown	Patch
@arch-ui/modal-utils	Patch
@arch-ui/popout	Patch
@keystonejs/app-admin-ui	Patch
@arch-ui/docs	Patch
@keystonejs/fields-color	Patch
@keystonejs/fields	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

[stale]

It looks like there hasn't been any activity here in over 6 months. Sorry about that! We've flagged this issue for special attention. It wil be manually reviewed by maintainers, not automatically closed. If you have any additional information please leave us a comment. It really helps! Thank you for you contribution. :)

[bladey]

Thanks for this PR @Vultraz.

Keystone 5 has officially moved into active maintenance mode as we push towards the next major new version Keystone Next, you can find out more information about this transition here.

In an effort to sustain the project going forward, we're cleaning up and closing old PRs such as this one.

However, you are welcome to create a PR under the Keystone 5 repository.

Please let me know if you have any questions.