Fix number of User Story in DashBoard

Author: Joao Jose Pedrini

app/views/user_stories/_us_for_show.html.erb

@@ -9,7 +9,7 @@
       <%= image_tag("/plugin_assets/redmine_sprints/images/us-top.png") %>
     <table>
       <tr >
-        <td><div class="tab_sprint_user_story">#<%= user_story.id %></div></td>
+        <td><div class="tab_sprint_user_story">#<%= user_story.us_number %></div></td>
         <td class="tab_us_name"><%=h user_story.name %></td>
         <td class="tab_us_links">
           <!--This will be done at some point-->