Allow copying and pasting metrics in analysis settings

[bttf]

Closes #1831

Changes

• Introduces compact clipboard icon underneath MetricsSelector component when metrics are selected
• Copy the list of metric IDs to clipboard on click
• Capture the onPaste event for select elements and check for:
  • That they are JSON.parse-able
  • That it is an array with metric id strings only
  • If so, we trigger an onChange with the given IDs, effectively setting the metrics. And block the paste event.
  • Otherwise, we bubble the paste event as usual

The clipboard icon, detail

[github-actions]

Your preview environment pr-2368-bttf has been deployed.

Preview environment endpoints are available at:

• https://growthbook-3000-pr-2368-bttf.growthbook.okteto.dev
• https://growthbook-3100-pr-2368-bttf.growthbook.okteto.dev

[bryce-fitzsimons]

tested functionality, works fine

[bttf]

Did some more testing this morning and pushed minor styling fixes; screencap in dark mode