Display tag "new" on actions

An author will see a "new" tag on each action or resource that has appeared on his dashboard since his last login.
Too add "new" tag on dashbord menu when there are new resources.

app/views/dashboard/_resource.html.erb

@@ -3,6 +3,9 @@
        data-equalizer-watch="resources"
        title="<%= resource_tooltip(resource, proposal) %>">
     <h4><%= resource.title %></h4>
+    <% if is_new_action_since_last_login?(resource, @new_actions_since_last_login) %>
+      <span class="label"><%= t("dashboard.progress.new_action") %></span>
+    <% end %>
     <p class="resource-description">
       <%= resource.short_description %>
     </p>