FeedBunch-app/app/views/layouts/navbar/_read_all_button.html.erb
<li id="read-all-button-wrapper"
ng-show="show_feed_buttons && (current_feed || current_folder)"
data-toggle="tooltip" data-placement="right"
title="<%= t 'layouts.navbar.read_all_button_tooltip' %>">
<a id="read-all-button" ng-click="mark_all_read()">
<i class="fa fa-check-square-o fa-fw"></i> <%= t 'layouts.navbar.read_all_button' %>
</a>
</li>