This involves a little refactoring of how our `defaultHomepage()` works.
It previously would check the meta tag / site settings each time it was
called but now it only checks once on application boot.
* Remove unused Discourse.SiteSettings
* Remove `Discourse.SiteSettings` from many tests
* REFACTOR: `lib:formatter` was using a lot of leaky state
* Remove more `Discourse.SiteSettings` from tests
* More SiteSettings removed from tests
Fixes a bug in search-menu-results (type: "group"), where:
```javascript
const fullName = escapeExpression(group.fullName);
const name = escapeExpression(group.name);
const groupNames = [h("span.name", fullName || name)];
```
`groupNames` could end up having value "undefined" if a group doesn't have a `fullName`.
This will make a few minor improvements to the second factor user interface. Highlights include:
- Using the site's title to prefix the backup code filename. If non-ascii characters are detected, then prefix "discourse" instead.
- Add icons and change the text on some of the buttons for better clarity and consistency
- Add an education link to the security key modal
Joffrey JAFFEUX
Robin Ward
Jarek Radosz
tshenry