ref: master
app/views/box_organizer/_block_types.html.erb
<% block_types.in_groups_of(2) do |block1, block2| %><%= labelled_radio_button(block1.description, :type, block1.name) %><% if block2 %><%= labelled_radio_button(block2.description, :type, block2.name) %><% end %> <% end %>