Fix #969 by implementing a new mobile view for notes.

Did not create tests for it

app/views/todos/_mobile_todo.rhtml

@@ -13,6 +13,7 @@ end -%>
 -%><span class="m_t">
 <%  end -%>
 <%= date_span -%> <%= link_to mobile_todo.description, todo_path(mobile_todo, :format => 'm') -%>
+<%= link_to(image_tag("mobile_notes.png", :border => "0"), mobile_todo_show_notes_path(mobile_todo, :format => 'm')) -%>
 <%  if parent_container_type == 'context' or parent_container_type == 'tag' -%>
 <%=    "<span class=\"prj\"> (" +
   link_to(mobile_todo.project.name, project_path(mobile_todo.project, :format => 'm')) + 

app/views/todos/mobile_show_notes.rhtml

@@ -0,0 +1,5 @@
+<h2>Next action description (<%= link_to "Go back", @return_path %>)</h2>
+<%= link_to @todo.description, todo_path(@todo, :format => 'm') -%></h2>
+<h2>Notes</h2>
+<%= format_note(@todo.notes)  %>
+<%= link_to "Back", @return_path %>