f-broadcast no longer supports class attribute

[runarb]

Back story:

We were using 0.0.4, but all of a sudden we were enforced with using the latest version which had a breaking change (api attribute was required, but didn't exist in 0.0.4). This forced us to upgrade to latest, 0.1.2.

In this version the class attribute is no longer supported. This makes it impossible to provide space below this component:

Obviously, we cannot just add a div around it and add margin to it, as that would give a lot of empty space at the top of the page.