Bug refixed ZK-2114: Native scrollbar remaining header column in grid/listbox
http://tracker.zkoss.org/browse/ZK-2114
Bug refixed ZK-2071: frozen scrollbar not working when auxhead is below listhead/columns/treecols
http://tracker.zkoss.org/browse/ZK-2071
Merge remote-tracking branch 'Noah/B70-ZK-2114'
Bug refixed B36-2935398: scroll down to press the button, then the input should show errorbox
Merge remote-tracking branch 'Noah/B70-ZK-2071'
Merge branch 'master' of https://github.com/zkoss/zk into B36-2935398
Bug refixed ZK-2047: IE Datebox calendar overlapping pdf problem
http://tracker.zkoss.org/browse/ZK-2047
Bug refixed ZK-2046: Scroll position is reset to top if resize column of a grid with rod
http://tracker.zkoss.org/browse/ZK-2046
'master' of https://github.com/zkoss/zk into Refix-ZK-2046
fix typo