remove unused code for the fixed of ZK-2294 with scrollIntoView
fixed for an side-effect on B50-3255116.zul
Fix IE and FF for the issue B30-1926480-1.zul and B30-1926480.zul
Feature ZK-2237: Support autodisable property for <a> component
update for feature ZK-2237
* Fine tune for IE and FF on the issue B30-1926480-1.zul and B30-1926480.zul
Bug fixed for B50-ZK-56.zul case
* bug fixed for customized scrollbar
* Change the default value of data-embedscrollbar from false to true, if the org.zkoss.zul.nativebar setting to false.
fine tune for B50-ZK-56.zul