从题库选用作业：编程作业变成普通作业时，编程相关的属性设置还存在

app/views/users/user_select_homework.js.erb

@@ -15,6 +15,8 @@ homework_description_editor.html("<%= escape_javascript(@homework.description.ht
 <% elsif @homework_detail_group %>
     $("#homeworkSetting").removeClass("undis");
     $("#homeworkSetting").html("<%=escape_javascript(render :partial => 'users/user_group_attr', :locals => {:edit_mode => true, :homework=>@homework, :not_allow_select => false}) %>");
+<% else %>
+    $("#homeworkSetting").addClass("undis");
 <% end %>
 document.getElementById("homework_type_option").options[<%=@homework.homework_type %>].selected = true;
 $("#select_type_nitice").hide();