feat(Clockface 4): Popovers

[ChitlangeSahas]

Closes https://github.com/influxdata/clockface/issues/873

Changes

// Describe what you changed

Screenshots

// Add screenshots here if relevant

Checklist

Check all that apply

• [ ] Updated documentation to reflect changes
• [ ] Added entry to top of Changelog with link to PR (not issue)
• [ ] Tests pass
• [ ] Peer reviewed and approved
• [ ] Signed CLA (if not already signed)