mailr/themes/olive/views/messages/_single_ops.html.erb

<div id="ops" class="ops">
<%= raw group_action_text(@multi1_buttons,t(:to_folder,:scope=>:folder)+ " " + simple_select_for_folders("folder","target",@folders_shown,'',true)) %>
<%= raw group_action(@multi3_buttons) %>

    <div id="header_source" title="<%= t(:header_source,:scope=>:message)%>">
    <pre>
        <%= @plain_header %>
    </pre>
    </div>
</div>