update window
Merge branch '7.0' of https://github.com/zkoss/zk into update-window
Merge branch '7.0' of https://github.com/zkoss/zk into update-window
Merge branch '7.0' of https://github.com/zkoss/zk into update-window
fix less and dnd; add icon
fix cant max by click close btn, reduce less, change icon button style
fine tuning
fine tuning
fine tuning less
extract variable
replace " with ', remove unused variable
contact string
* rm unused comment
* replace $.each with jq.each (opera bug)
* replace $node.find('>div:...') with this.$n()
* rm beforeSize()
* replace '-over' with '-hover'
rm hover class, replace (zcls, '-xxx') with this.$s('icon-xxx')