solidus

Hello, I'm wondering how _Solidus_ work with _Font Awasome_

When I use '_ban_' it's working, but when I put '_banjo_' for exemple there is no icon show (<https://fontawesome.com/search?q=ban>)
```# ...
Spree::Backend::Config.configure do |config|
  # ...
  config.menu_items &lt;&lt; config.class::MenuItem.new(
    [:rejected_orders],
    'banjo',
    url: '/admin/orders?q[rejected_eq]=true',
    position: 0
  )
end```

take a look here: <https://github.com/solidusio/solidus/blob/482a56a6209f086b5b2455856e50e91ff7208449/backend/app/helpers/spree/admin/navigation_helper.rb#L47>

and

<https://github.com/solidusio/solidus/blob/482a56a6209f086b5b2455856e50e91ff7208449/backend/app/helpers/spree/admin/navigation_helper.rb#L115>

This search outlines how we are using the font-awesome gem: <https://github.com/search?q=repo%3Asolidusio%2Fsolidus+font-awesome&amp;type=code>

By a quick looking, the main problem was that I did not choose the _free_ icons and I think the second problem (not showing free icons something) maybe come from using the unoffical gem instead the official gem

<https://fontawesome.com/docs/web/use-with/ruby-on-rails>