app/views/challenges/index.html.erb
<div class='content'>
<div class="masthead">
<div class="row">
<h2>Challenges</h2>
</div>
</div>
<%= concept(Challenge::Cell::ChallengesSubnav,
@all_challenges,
challenge_filter: @challenge_filter,
current_participant: current_participant) %>
<div class="row">
<ul class="list-challenges">
<%= render partial: 'challenges' %>
</ul>
</div>
<%= render partial: 'shared/load_more',
locals: { collection: @challenges } %>
</div>