Bug fixed 3298164: should not see red area at the bottom of listbox
Style fixed: the icon of window and panel sholud show correct
Merge branch 'master' of https://github.com/zkoss/zk into fix-70
Merge branch 'master' of https://github.com/zkoss/zk into fix-70
Merge branch 'master' of https://github.com/zkoss/zk into fix-70