Add display last modified user in admin index page.

app/views/admin/faqs/_index.html.erb

@@ -4,6 +4,7 @@
     <% @table_fields.each do |f| %>
       <%= thead(f) %>
     <% end %>
+    <th><%=t('faq.update_user')%></th>
     </tr>
   </thead>
   <tbody>
@@ -36,6 +37,7 @@
           <span class="label label-warning"><%= tag.name %></span>
         <% end %>
       </td>
+      <td><%=User.find(qa.update_user_id).user_name rescue ''%></td>
     </tr>
   <% end %>
   </tbody>

config/locales/en.yml

@@ -18,6 +18,7 @@ en:
     read_more: Read More
     question: Question
     answer: Answer
+    update_user: Last modified
   qa:
     create_qa_category_success: FAQ category was successfully created
     editing_web_resource: Editing FAQ

config/locales/zh_tw.yml

@@ -16,7 +16,7 @@ zh_tw:
     read_more: 閱讀更多
     question: 問題
     answer: 回答
-
+    update_user: 最後修改者
   qa:
     create_qa_category_success: 問與答類別已成功建立
     editing_web_resource: 編輯問與答