enhanced custom Ribbon Bar Control (based on Bruce Armstrong version)

This enhanced version of Bruce Armstrong's Custom Ribbon Bar Control allows to choose between two mode of triggering Ribbon Bar Item 's event setting the new u_rbb's #CentralizedEventHandling property value :

FALSE = Default behaviour -> Events are triggered to parent window as designed by Bruce Armstrong (ue_ + item.tag)
TRUE = New behaviour -> events are triggered to centralized new u_rbb 's event called itemClicked that work in the same fashion than the buttonclicked event of the Dw control.