Fixed #5566 dropdown popup positioning in contents page

[kanhaiya04]

Fixed #5566,

Implemented the dropdown with PopperJS.

Screencast.from.14-01-24.02.56.01.PM.IST.mp4

[netlify]

✅ Deploy Preview for plone-components canceled.

Name	Link
🔨 Latest commit	f19e91d
🔍 Latest deploy log	https://app.netlify.com/sites/plone-components/deploys/65b147a60ffb13000762007e

[netlify]

✅ Deploy Preview for volto ready!

Name	Link
🔨 Latest commit	f19e91d
🔍 Latest deploy log	https://app.netlify.com/sites/volto/deploys/65b147a60a4a470009eb7894
😎 Deploy Preview	https://deploy-preview-5622--volto.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[mister-roboto]

@kanhaiya04 you need to sign the Plone Contributor Agreement to merge this pull request.

Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

[kanhaiya04]

@kanhaiya04 you need to sign the Plone Contributor Agreement to merge this pull request.

Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

I have signed the agreement on 12 Jan.
Why is still showing this??

[stevepiercy]

@kanhaiya04 you need to sign the Plone Contributor Agreement to merge this pull request.
Learn about the Plone Contributor Agreement: https://plone.org/foundation/contributors-agreement

I have signed the agreement on 12 Jan. Why is still showing this??

From that very page, which you, of course, read before signing and returning the Plone Contributor Agreement, right? 😉

I signed the Agreement, but haven't been given access yet.
Please allow a few days of response time; the handling of Contributor Agreements is done by volunteers. If you have issues, or for instance think you may have made a spelling error in your email or github username, contact agreements@plone.org

Additionally, please read and follow Contributing to Plone and First-time contributors.

[stevepiercy]

Suggestion to clarify the change log entry.

[stevepiercy]

News item looks good, but the rest of the PR still needs review by a core contributor.

I only approve the news item

[ichim-david]

I'll try to have a look at this today, but no promises.