adds feature #1309 within poup.js

[Parvchannel]

PR Update: Confirmation Dialog for Sorting Tabs

Hi @dannycolin

Thank you for the guidance I've implemented the suggested changes by moving the confirmation dialog inside the add-on popup. Now, everything works as expected—users will see a confirmation before sorting tabs, ensuring a consistent experience across all pages.

However, I’m facing one issue: the changes I made to messages.json in _locales @ bdaa012 are not being reflected in my PR. I’d appreciate any insights on why this might be happening and how to resolve it.

Looking forward to your feedback. Thanks!

[dannycolin]

For the translation, you need to open a separated PR in https://github.com/mozilla-l10n/multi-account-containers-l10n/ and only add the necessary strings for the english locales. Other locales are translated on pontoon.mozilla.org.

So far, this PR looks good to me. Do not forget to npm run lint locally and fix any issue introduced by your changes. You can ignore warnings that already exist especially those related to Unsafe assignment to innerHTML.