Possibility to filter per platform

[Ainali]

When lists are long, like on a country or topic page it would be nice to be able to filter on just a single platform. For example, on the page for Sweden or the page for Environmental protection, I could select to only see Twitter accounts or YouTube accounts.

[Abbe98]

Considering that we show a line for each agency and that we aren't nessisarly displaying accounts other than for a few platforms, would we want the filter to be limited to those few ones?

[Ainali]

As a start, that seems like the easy way to go.