fix some bug and add update accessibility

app/views/admin/patchfiles/index.html.erb

@@ -14,6 +14,7 @@
 		<%end%>
 	<%end%>
 	<%=file.submit "#{t(:updatefont)}"%>
+	<button><%=(I18n.locale.to_s =="zh_tw") ? "復原到上次更新的檔案狀態" : "recovery to prev file status"%></button>
 <%end%>
 <li id ="ckeditorFont" class="show_li">
 	<a title="CKEDITOR現有字形">CKEDITOR現有字形</a>