Port FloatingBannerView and ReviewReplyDraftBannerView to spina.
Review Request #12810 — Created Jan. 26, 2023 and submitted — Latest diff uploaded
In order to be able to subclass the FloatingBannerView for the new
unified banner, we first need to update it to use TypeScript and spina.
This also required updating the ReviewReplyDraftBannerView to match.
- Verified that review reply banners worked correctly.
- Ran js-tests.