Merge pull request #66 from jerrywell/7.0-Stable

add ztl test case
Bug ZK-2244: Defective movements in the ZK 7.0.1 Listbox.
 - The bug was fixed in this fixed - ZK-2305 with this commit - https://github.com/zkoss/zk/commit/593bc938122f69a6352815f70f0967024106afe5
Merge branch '7.0-Stable' of github.com:zkoss/zk
Bug ZK-2328: Listbox with selected item make the whole browser scroll
Refine the fixed of ZK-2296 and fix for ZK-2328.
Merge remote-tracking branch 'upstream/6.5'
Bug ZK-2325: Spacing="0" and spacing="0px" produce different results for hbox/vbox on some browsers
Merge pull request #67 from jerrywell/master

Bug ZK-2325: Spacing="0" and spacing="0px" produce different results for...
Bug ZK-2331: Combobox drop-down sometimes not open on top of input element if the browser space is not enough
Merge pull request #68 from jerrywell/master

Bug ZK-2331: Combobox drop-down sometimes not open on top of input eleme...