更改课程图标显示逻辑，添加课程图标文件夹

app/views/users/_course_form.html.erb

@@ -25,8 +25,8 @@
                         <%= l(:label_homework) %>
                         (<span class=""><%= link_to (membership.course.homeworks.count), {:controller => 'courses', :action => 'homework', :id => membership.course.extra} %></span>)
                         &nbsp;&nbsp;
-                        <%= l(:label_course_news) %>
+                        <%#= l(:label_course_news) %>
-                        (<span style="color: #ed8924"><%= link_to (membership.course.news.count), {:controller => 'news', :action => 'index', :course_id => membership.course.extra} %></span>)
+                        (<span style="color: #ed8924"><%#= link_to (membership.course.news.count), {:controller => 'news', :action => 'index', :course_id => membership.course.extra} %></span>)
                       </span></td>
                   </tr>
                   <tr>