feat(DialogFooter): refactored dialog footer to functional component

[ahmadJT]

Fixes #6289

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

• refactored dialog footer to functional component

Reviewers should focus on:

• DialogFooter

Screenshot

[changelog-app]

Generate changelog in packages/core/changelog/@unreleased

What do the change types mean?

• feature: A new feature of the service.
• improvement: An incremental improvement in the functionality or operation of the service.
• fix: Remedies the incorrect behaviour of a component of the service in a backwards-compatible way.
• break: Has the potential to break consumers of this service's API, inclusive of both Palantir services
  and external consumers of the service's API (e.g. customer-written software or integrations).
• deprecation: Advertises the intention to remove service functionality without any change to the
  operation of the service itself.
• manualTask: Requires the possibility of manual intervention (running a script, eyeballing configuration,
  performing database surgery, ...) at the time of upgrade for it to succeed.
• migration: A fully automatic upgrade migration task with no engineer input required.

Note: only one type should be chosen.

How are new versions calculated?

• ❗The break and manual task changelog types will result in a major release!
• 🐛 The fix changelog type will result in a minor release in most cases, and a patch release version for patch branches. This behaviour is configurable in autorelease.
• ✨ All others will result in a minor version release.

Type

• Feature
• Improvement
• Fix
• Break
• Deprecation
• Manual task
• Migration

Description

feat(DialogFooter): refactored dialog footer to functional component

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• Generate changelog entry

[ggdouglas]

Requesting some minor changes, but otherwise looking good

[ggdouglas]

Can we add displayName here?

Suggested change

	};
	};
	DialogFooter.displayName = `${DISPLAYNAME_PREFIX}.DialogFooter`;

[ggdouglas]

Can we preserve these comments in the refactored structure of the component?

{/* Render the main footer section (left aligned). */}
<div className={Classes.DIALOG_FOOTER_MAIN_SECTION}>{children}</div>
{/* Optionally render the footer actions (right aligned). */}
{actions && <div className={Classes.DIALOG_FOOTER_ACTIONS}>{actions}</div>}