We often have the need to use rich HTML in dialog messages (to show lists, icons, etc.). Previously, our only option was to wrap the message in an `htmlSafe()` call. This PR adds the ability to pass a component name and model to the dialog, which means that we can write the HTML in regular Ember components.
Example, whereas previously we would do this:
```
this.dialog.deleteConfirm({
message: htmlSafe(`<li>Some text</li>`),
});
```
instead we can now do this:
```javascript
import SecondFactorConfirmPhrase from "discourse/components/dialog-messages/second-factor-confirm-phrase";
...
this.dialog.deleteConfirm({
title: I18n.t("user.second_factor.disable_confirm"),
bodyComponent: SecondFactorConfirmPhrase,
bodyComponentModel: model,
})
```
The model passed to the component is optional and will be available as `@model` in the Handlebars template.
In this PR, we introduced an option, that when all authenticators are disabled, but backup codes still exists, user can authenticate with those backup codes. This was reverted as this is not expected behavior.
https://github.com/discourse/discourse/pull/18982
Instead, when the last authenticator is deleted, backup codes should be deleted as well. Because this disables 2fa, user is asked to confirm that action by typing text.
In addition, UI for 2fa preferences was refreshed.
