bug fixed: the icon inside groupbox should show well when groupbox open
borderlayout style minor fix
style fixed: the close icon of errorbox should show well when it open in
ie8
style fixed: the button of header and itself should not use filter
notification style fixed: the icon should show well when no reference
Merge branch '7.0' of https://github.com/zkoss/zk into fix-ie8

Conflicts:
	zul/src/archive/web/js/zul/grid/less/grid.less
	zul/src/archive/web/js/zul/sel/less/listbox.less
	zul/src/archive/web/js/zul/sel/less/tree.less
reset Z65-Flex-025.zul
bug fixed: the checkbox of selectwidget should look good when it checked
bug fixed: the faker-bar of checkmark tree should exist in ie8
Merge branch '7.0' of https://github.com/zkoss/zk into fix-ie8
Merge branch '7.0' of github.com:zkoss/zk into 7.0
style fixed: the bg of combobutton-toolbar should be transparent in ie8
Feature ZK-1919: ZK Components support static uuid
http://tracker.zkoss.org/browse/ZK-1919
Merge branch 'fix-ie8' of git://github.com/huangnoah/zk into 7.0
Merge branch '7.0' of github.com:zkoss/zk into 7.0
add release note
Merge remote-tracking branch 'VincentJian/F70-ZK-1919' into 7.0