adjust some style
adjust icon when panel is close
adjust vertical mold, tab:disable and rm lite mold style
Merge branch '7.0' of https://github.com/zkoss/zk into update-tabbox
adjust less tree, selected tab box-shadow, fixHgh() when tab set hgh
Merge branch '7.0' of https://github.com/zkoss/zk into update-tabbox

Conflicts:
	zul/src/archive/web/js/zul/tab/less/tabbox.less
[dom] adjust tabpanel dom tree in accordion mold
[less] adjust less tree and order
[less] adjust groupbox and caption style
Merge branch 'update-tabbox' of git://github.com/huangnoah/zk into 7.0
Merge branch 'update-groupbox' of git://github.com/huangnoah/zk into 7.0
Merge branch 'update-panel' of git://github.com/huangnoah/zk into 7.0
Modify test2: F70-ZK1835.zul
minor tune
Merge branch '7.0' of github.com:zkoss/zk into 7.0
Merge branch 'feature-nav' of git://github.com/RaymondChao/zk into 7.0
optimized performance for hflex with min
Merge branch '7.0' of github.com:zkoss/zk into 7.0
adjust less tree
Merge branch '7.0' of https://github.com/zkoss/zk into update-tabbox
optimized