fix avalon.at bdo元素为null的BUG
Merge branch 'master' of github.com:RubyLouvre/avalon.oniui
Merge pull request #284 from gogoyqj/master

删除doublelist内多余代码
change className logic
Merge branch 'master' of https://github.com/RubyLouvre/avalon.oniui.git